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If the coefficient of 5^(th) and 3^(rd) ...

If the coefficient of `5^(th) and 3^(rd)` terms in the expansion of `(sqrt(15/2)x + 1/x^2)^n` where `n in NN` are equal, then the term independent of `x` is (A) 5th (B) 4th (C) 6th (D) 7th

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