# UGC-NET | UGC NET CS 2016 July – III | Question 56

Let L = {0^{n}1^{n}|n ≥ 0} be a context free language.

Which of the following is correct ?**(A)** L` is context free and L^{k} is not context free for any k ≥ 1.**(B)** L` is not context free and L^{k} is not context free for any k ≥ 1.**(C)** Both L` and L^{k} is for any k ≥ 1 are context free.**(D)** Both L` and L^{k} is for any k ≥ 1 are not context free.**Answer:** **(C)****Explanation:**

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