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The co-efficient of x x^(n-2) in (x-1...

The co-efficient of x `x^(n-2)` in `(x-1)(x-2)(x-3)(x-n)` is :

A

`(n(n^(2)+2)(3n+1))/(24)`

B

`(n(n^(2)-1)(3n+2))/(24)`

C

`(n(n^(2)+1)(3n+4))/(24)`

D

None of these

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The correct Answer is:
A
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