If 1+(1+2)/2+(1+2+3)/3+..... to n terms ...

If `1+(1+2)/2+(1+2+3)/3+.....` to n terms is S. Then , S is equal to

A

`(n(n+3))/4`

B

`(n(n+2))/4`

C

`(n(n+1)(n+2))/6`

D

`n^2`

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The correct Answer is:

A

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