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If n(1)+n(2)+n(3)+n(4)=20 such that n(i)...

If `n_(1)+n_(2)+n_(3)+n_(4)=20` such that `n_(i)gei+1AAiin{1,2,3,4}` and `n_(i)"n" inI` then number of solutions are

A

84

B

126

C

286

D

140

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