Which statement related to India's size has correct unit but wrong category?

Correct answer: (2933) km is area

The direct answer is C: 2933 km is called area, although kilometre is a unit of length. To solve this, first identify what is being measured. A boundary, coastline, or north–south extent measures distance, so kilometre is suitable. Area measures the surface covered by a country and must be written in square kilometres, such as km². Thus the unit in C is not suitable for the category named. Option A is correct because 15,200 km is a length used for India’s land boundary. Option B is correct because 7,516.6 km is a length used for the coastline. Option C is wrong because 2933 km cannot be an area; an area needs square units, and the statement also does not give a meaningful area value. Option D is correct because 3214 km expresses the north–south distance, which is a length. Always match the kind of quantity with its unit: length uses km, while area uses km². Memory cue: “line means km, surface means km².”