Primary colours

Correct answer: A. हरा पीले और नीले के मिश्रण से बनता है

Explanation: In the traditional subtractive painting model used for basic colour theory, green is a secondary colour because it is made by mixing the primary colours yellow and blue. Option A identifies the relevant production rule and corrects the misconception. Brightness, warm-or-cool classification, and appearance on a colour wheel do not determine whether a colour is primary or secondary.

Correct answer: A. Red, yellow and blue

Explanation: The governing concept is the traditional subtractive colour model used in school painting. Red, yellow, and blue are taught as the primary colours because they are treated as basic pigments from which secondary colours can be mixed. Thus, option A is correct. Orange, green, and violet are secondary colours, while black and white are commonly used for darkening and lightening rather than belonging to this primary-colour group.

Correct answer: B. In traditional colour mixing, blue is not made from other primary colours

Explanation: In the traditional school paint-pigment model, blue is classified as a primary colour. This means it is treated as a basic colour that is not produced by mixing the other primary colours, so option B is correct. Yellow and red make orange, not blue. The remaining combinations may create dull or uncertain results depending on pigments, but they are not the standard explanation of how primary blue is obtained.

Correct answer: B. The colour becomes darker

Explanation: The governing concept is shade formation in colour mixing. Adding a small amount of black reduces the lightness of the original colour, so the mixture appears darker and forms a deeper shade. Hence, option B is correct. Black does not normally increase brightness or make poster colour transparent, and it cannot make the paint disappear. Because black is strong, it should be added gradually and mixed carefully to avoid making the colour excessively dull.

Correct answer: A. Red, yellow and blue

Explanation: The governing concept is the traditional subtractive colour system used in school painting. Red, yellow, and blue are taught as the primary colours because they serve as basic hues for mixing many other colours. Therefore, option A is correct. Green, orange, and violet are secondary colours formed by mixing primaries, while the remaining sets are not the standard primary group.

Correct answer: B. Red, yellow, blue

Explanation: Within the traditional painting colour model used in school art education, red, yellow, and blue are taught as the primary colours. They serve as basic colours for mixing secondary colours: yellow and blue can produce green, red and yellow can produce orange, and red and blue can produce violet. Thus option A lists secondary colours, while the other groups are mixtures or non-primary descriptive colours. Option B is correct.

Correct answer: A. Primary colours

Explanation: In traditional painting colour theory, red, yellow, and blue are primary colours because they are used to make other colours by mixing. Secondary colours are produced by mixing two primary colours, so they are not the correct answer. Exam tip: Remember red, yellow, and blue as the primary colours of the traditional RYB colour wheel.