The coefficient of x^(n-2) in the polyno...

The coefficient of `x^(n-2)` in the polynomial `(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:

B

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