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If for xgt0f(x)=(a-x^n)^(1/n), g(x)=x^2+...

If for `xgt0f(x)=(a-x^n)^(1/n), g(x)=x^2+px+q,p,q epsilon R` and equation `g(x)-x=0` has imaginary roots, then number of real roots of equation `g(g(x))-f(f(x))=0` is (A) 0 (B) 2 (C) 4 (D) none of these

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