If $f(x)=(p-x^n)^{\Large\frac{1}{n}}$$, p\; >\; 0$ and n is a positive integer, then $f(f(x))$=

Question

\[(a)\;x \quad (b)\;x^n \quad (c)\;p^{\frac{1}{n}} \quad (d)\;p-x^n \]