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Number of odd proper divisors of 3^(p).6...

Number of odd proper divisors of `3^(p).6^(m).21^(n)` is :

A

(p+1) (m+1) (n+1) -2

B

`(p+m+n+1)-1`

C

`(p+1)(m+1)(n+1)-1`

D

None of these

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The correct Answer is:
D
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