Balanced diet and Recommended Dietary Allowances

A balanced diet contains all essential nutrients—carbohydrates, proteins, fats, vitamins, minerals, fibre, and water—in suitable proportions for the person’s age, sex, activity, and health needs. It supplies energy, supports growth and repair, and helps maintain normal body functions. Eating only one food group cannot provide balance.

Dietary variety means including different foods and food groups, such as cereals, pulses, milk or alternatives, vegetables, fruits, nuts and suitable oils. Different foods provide different proportions of carbohydrates, proteins, fats, vitamins, minerals, fibre and other useful compounds. Variety therefore supports nutrient adequacy and a balanced diet. Option B is correct; appearance, cost and reducing quantity are not the main nutritional reasons.

Dietary fibre is the largely indigestible part of plant foods. Good sources include fruits, vegetables, legumes, nuts, seeds, and whole grains such as oats, brown rice, and whole-wheat products. Fibre supports normal bowel movement, may help prevent constipation, and contributes to fullness and healthy dietary patterns. Ghee, sugar, and salt do not provide meaningful dietary fibre. Therefore, option B is correct.

Easily digestible food is food that can generally be broken down and absorbed by the digestive system with less difficulty or discomfort. Depending on the patient, it may involve suitable cooking, a soft texture, moderate fat and avoidance of irritating ingredients; it is not necessarily raw, blue or hard. Digestibility can vary with health status, so the diet should be individualised. Therefore, food that is easy to digest is the correct answer.

Fruits and vegetables supply vitamins, minerals, dietary fibre, water, and many protective plant compounds. These nutrients support normal body functions, digestion, immunity, and overall health. They are not automatically medicines and they do not remove the need to drink water. Including a variety of colourful fruits and vegetables in suitable portions contributes to a balanced diet, although special medical diets may require individual advice.

Protein supplies amino acids required for growth, maintenance, enzyme formation, immune substances, and repair of damaged tissues. When protein intake is inadequate, wound healing may become slower and the body may have difficulty replacing or rebuilding cells. Temperature regulation is controlled mainly by the nervous and endocrine systems, although nutrition supports normal metabolism. Tooth enamel formation depends especially on proper mineralisation, including calcium and phosphate, rather than being the primary function tested here. Thus, tissue repair is the best answer.

Pickles and salty snacks are often prepared or preserved with substantial quantities of salt, making them common sources of excess sodium. Packaged savoury foods, papad, sauces, instant foods, and some processed products may also contribute considerably. Fresh unsalted fruit and plain boiled rice generally contain little added sodium. Plain milk contains naturally occurring minerals, including a modest amount of sodium, but it is not usually as concentrated a source as pickles or salty snacks. Therefore, option B is correct.

The balanced-plate idea is a simple way to plan meals by including appropriate portions from important food groups, such as cereals or other staples, vegetables, fruits, protein-rich foods, and suitable dairy or alternatives. It encourages variety, moderation, and nutritional adequacy. Consequently, it helps a person select food groups correctly rather than focusing on unrelated household or recreational tasks.

Fruits and vegetables supply many vitamins, minerals, water, and dietary fibre. These nutrients help maintain body functions, support immunity, and promote normal digestion. Because different fruits and vegetables contain different nutrients, eating a varied selection contributes to a balanced diet rather than replacing all other food groups.

Pulses such as lentils, beans, and peas are important plant sources of protein. Protein supports growth, tissue repair, enzyme formation, and maintenance of body tissues. Pulses also provide fibre, complex carbohydrates, and several minerals, so combining them with cereals can improve the nutritional quality of a customary meal.

Dietary fibre is found in whole grains, pulses, fruits, and vegetables. It adds bulk to food, supports regular bowel movements, and can help prevent constipation. Fibre also contributes to fullness and may support healthy blood glucose and cholesterol levels, so it is an important part of a balanced diet when consumed with adequate fluids.

Different food groups supply different combinations of nutrients, such as carbohydrates, proteins, fats, vitamins, minerals, fibre, and water. Selecting suitable foods from the major groups helps a person obtain variety and balance while meeting energy and nutrient needs. In a patient's diet, the choices may also need modification according to the disease and medical advice. Hiding food, frightening the patient, or stopping tests has no nutritional benefit. Therefore, option A is correct.

Milk and milk products can provide well-absorbed calcium, protein, phosphorus, and sometimes vitamin D when fortified. These nutrients support bones, teeth, muscle function, and tissue maintenance. Their suitability depends on the patient’s condition, tolerance, allergies, and treatment plan; for example, lactose intolerance may require an alternative.

Whole grains retain the bran, germ, and endosperm, so they generally provide complex carbohydrates for energy as well as more fibre, vitamins, minerals, and beneficial plant compounds than refined grains. Fibre supports bowel health and satiety. Thus, whole grains are valuable components of a balanced diet rather than sources of salt or medicine.

Pulses such as lentils, chickpeas, beans, and peas provide useful plant protein at a comparatively low cost. They also supply fibre, complex carbohydrates, iron, and other nutrients. Combining cereals with pulses, such as rice with dal, improves the overall quality of plant protein. Their affordability makes them especially valuable for planning balanced family meals.

Dietary fibre supports digestive health by adding bulk to stool and helping regular bowel movement. Fibre from whole grains, pulses, fruits, and vegetables can help prevent constipation and supports a healthy intestinal environment. Some fibres also help regulate blood glucose and cholesterol. Adequate water is important when increasing fibre, and individual medical advice may be needed in specific conditions.

Whole grains retain more parts of the grain, including the bran and germ, whereas refining removes much of these components. As a result, whole grains generally provide more dietary fibre, vitamins, minerals, and beneficial plant compounds. They may support digestion and better dietary quality, although portion size and the person’s total diet still matter.

Large amounts of added sugar can increase energy intake without supplying many essential nutrients. Frequent sugary foods and drinks may displace more nutritious foods and make it harder to maintain a balanced diet. Limiting excess sugar supports healthier eating patterns, though the appropriate amount depends on the person’s age, health condition, total diet, and professional dietary advice.

A balanced diet supplies adequate amounts of carbohydrates, proteins, fats, vitamins, minerals, water, and fibre according to a person's age, sex, activity, and health needs. It includes variety, moderation, and suitable proportions rather than depending on one food. Thus, option C gives the correct definition.

Protein is a body-building nutrient. It supplies amino acids needed for the growth, maintenance, and repair of muscles, skin, organs, enzymes, hormones, and other tissues. Protein can also provide energy when required, but its most characteristic function in school nutrition is body building and tissue repair. Therefore, option A is correct.

Undernutrition occurs when the body receives less energy, protein or other essential nutrients than it needs for growth, maintenance and normal functioning. It may lead to low body weight, poor growth, weakness and nutrient-deficiency diseases. It is different from overnutrition, which involves excessive nutrient or energy intake. Therefore, option C is correct.

Overnutrition refers to consuming more energy or certain nutrients than the body requires over time. Excess energy, especially when combined with low physical activity, can be stored as body fat and may increase the risk of overweight, obesity and related health problems. Therefore, overnutrition is correctly linked with excess energy intake, making option D correct.

Iron is an essential mineral required for the formation of haemoglobin, the iron-containing protein in red blood cells that carries oxygen from the lungs to body tissues. Inadequate iron intake can cause iron-deficiency anaemia, tiredness and reduced work capacity. Calcium is more closely associated with bones and teeth, so option D is correct.

Dietary variety is necessary because no single food usually supplies every nutrient in the amounts the body needs. Including cereals, pulses, vegetables, fruits, milk or alternatives, nuts and suitable fats improves the chance of receiving adequate protein, vitamins, minerals, fibre and energy. Variety also makes meals more acceptable and supports a balanced diet. Therefore, option D is correct.

Whole grains retain the bran and germ, while refining removes much of these parts. As a result, whole grains generally provide more dietary fibre and may retain more vitamins, minerals and beneficial plant compounds. Fibre supports bowel regularity and can improve satiety, so option B is correct, although the exact nutrient content varies by grain.