Q 1371680526.     If `text()^(k^2-k)C_2=text()^(k^2-k)C_4` then `k` is equal to

A

`1`

B

`3`

C

`4`

D

None of these

HINT

We know that `text()^nC_p=text()^nC_q` then `p+q=n`
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