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Study Stuff for MCA Examinations - NIMCET
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Which of the following are context free language ?
(A) ${w^i x^j y^k z^l \mid i + k = j + l,; i,j,k,l \ge 0}$
(B) ${w^i x^j y^k z^l \mid i = j \text{ and } k = l,; i,j,k,l \ge 0}$
(C) ${w^i x^j y^k z^l \mid i = j = k \text{ and } k \ne l,; i,j,k,l \ge 0}$
(D) ${w^i x^j y^k z^l \mid i = j = k + l,; i,j,k,l \ge 0}$
(E) ${w^i x^j y^k z^l \mid i = j \text{ and } k \ne l,; i,j,k,l \ge 0}$
Choose the correct answer from the options given below :
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