The statement 1+2+3+......+n=(n(n+1))/2 ...

The statement `1+2+3+......+n=(n(n+1))/2` for `n=3` becomes
`(A) 3=(3times4)/2`
`(B) 1+2=(3times4)/2`
`(C) 1+2+3=(3times4)/2`
`(D) 1+3=(3times4)/2`

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