If underset(x to 0)lim({(a-n)nx - tan x}...

If `underset(x to 0)lim({(a-n)nx - tan x} sin nx)/x^(2) = 0`, where n is non-zero real number, then a is equal to

A

0

B

`(n+1)/(n)`

C

`n`

D

`n+(1)/(n)`

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The correct Answer is:

D

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