What is most important in the fact showing India's area?

Correct answer: Correct number and correct unit

The governing concept is precision in reporting a geographical measurement. A complete statement of India’s area must include both the numerical value, approximately 3.287 million square kilometres, and the unit, square kilometres. Therefore, option A is correct. A number without a unit is incomplete because the same numerical value could refer to kilometres, hectares, or another measure. Conversely, a unit without a number cannot communicate the size. The length of an option, the use of English words, or colourful letters has no effect on geographical accuracy. Correct number and unit together allow readers to compare India’s area with other countries and use it in calculations such as population density. Precision is therefore more important than presentation style.