Which value is most suitable for India's area?

Correct answer: 3.28 million square kilometres

Area measures the extent of a surface, so it must be expressed in square units such as square kilometres. India’s commonly accepted geographical area is about 3.28 million square kilometres, equal to approximately 3,280,000 square kilometres. Option B is therefore correct because it has both the appropriate unit and a realistic magnitude for a large country. Option A uses a square unit but is far too small to represent the whole of India. Options C and D use kilometres without the word square, so they describe linear distance, not area; they could refer to approximate lengths or spans but cannot represent a country’s surface area. The essential reasoning is to check both the measurement unit and the scale of the number.