Find the sum to 'n' terms of 1.2.3 +2.3....

Find the sum to 'n' terms of 1.2.3 +2.3.4+3.4.5+……

A

`(n(n+1)(n+2)(3n+5))/2`

B

`(n(n+1)(n+2)(3n+3))/4`

C

`2n(n+1)(n+2)(n+3)`

D

`(n(n+1)(n+2)(3n+1))/12`

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The correct Answer is:

B

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