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Given p no. of A.P. each of which consis...

Given p no. of A.P. each of which consists of an n terms. If their first terms are 1,2,3.... p are in common differences are 1,3,5...2p-1 respectively, then the sum of the terms of all progressions is

A

`1/2np(np+1)`

B

`1/2n(p+1)`

C

`np(n+1)`

D

none of these

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The correct Answer is:
A
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