If the coefficient of x^100 is in 1+(1+x...

If the coefficient of `x^100` is in `1+(1+x)+(1+x)^2+(1+x)^3+………+(1+x)^n , (n >= 100) is ^201C_101` then n (A) 100 (B) 200 (C) 101 (D) none of these

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