The length of the diagonal of a square is ‘a’ cm. Which of the following represents the area of the square (in sq.cm) ?
[A] \frac{a^{2}}{4}
[B] \frac{a}{\sqrt{2}}
[C] 2a
[D] \frac{a^{2}}{2}

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This question is part of UPSC Prelims Practice and Mock Tests membership programme.

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