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If ""^(n-1)Cr=(k^2-3)""^nC(r+1), then ki...

If `""^(n-1)C_r=(k^2-3)""^nC_(r+1)`, then `kin` :

A

`(-oo,-2)`

B

`[2, oo)`

C

`[-sqrt(3), sqrt(3)]`

D

`(sqrt(3), 2]`

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The correct Answer is:
D
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