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If the second term of the expansion [a^(...

If the second term of the expansion `[a^(1/(13))+a/(sqrt(a^(-1)))]^n` is `14 a^(5//2)` , then the value of `(^n C_3)/(^n C_2)` is.

A

4

B

3

C

12

D

6

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The correct Answer is:
A
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