If \( n \) is odd, the sum of \( n \) terms of the series \( 1^{2}-2^{2}+3^{2}-4^{2}+5^{2}-6^{2}...
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0If \( n \) is odd, the sum of \( n \) terms of the series \( 1^{2}-2^{2}+3^{2}-4^{2}+5^{2}-6^{2}+\ldots \ldots \), is
(A) \( \frac{n(n+1)}{2} \)
(B) \( \frac{-n(n+1)}{2} \)
(C) \( \frac{n(n-1)}{2} \)
(D) \( \frac{-n(n-1)}{2} \)
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