If nC4, nC5 and nC6 are in AP, then n can be

1.	If nC4, nC5 and nC6 are in AP, then n can be
A.	9
B.	11
C.	14
D.	12
Answer» D. 12

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If nC4, nC5 and nC6 are in AP, then n can be

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