In India's size, 3.28 million square kilometres belongs to which category of figure?

Correct answer: Area

Direct answer: Option A, area. Area tells how much surface a piece of land covers, so its unit is a square unit such as square kilometres. India’s commonly stated area is about 3.28 million square kilometres. The word “square” is the key clue: a length or distance is measured in kilometres, but a surface extent is measured in square kilometres. Option A is correct because 3.28 million square kilometres expresses India’s total land area or geographical area. Option B is wrong because a land boundary is a line around or along land and is normally measured in kilometres, not square kilometres. Option C is wrong because coastline is also a linear length, not a surface area. Option D is wrong because directional distance describes a distance in a direction and is not the category represented by this figure. The reasoning is therefore unit first, meaning second: square kilometres indicate area, and the national figure describes India’s size as surface extent. Memory cue: square units measure space covered.