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If (1 + x)^(n) = C(0) + C.x^(1) +....+ C...

If `(1 + x)^(n) = C_(0) + C.x^(1) +....+ C_(n) x^(n)`, then `C_(0)-C_(2) + C_(4) - C_(6) + ..... =`

A

`2^(n-1)`

B

`2^(n//2)"sin" (npi)/(4)`

C

`2^(n//2)"cos" (npi)/(4)`

D

zero

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