A) $ n{{(n-1)}^{n-2+2^{n-1}}} $
B) $ n{{(n-1)}^{n-2}} $
C) $ n{{(n-1)}^{n-3}} $
D) None of these
Correct Answer: D $ \Rightarrow [1^{2}C_1+3^{2}C_3+5^{2}C_5+…] $ $ =n(n-1)2^{n-3}+n\cdot 2^{n-2}. $
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