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GATE | GATE CS 2018 | Question 46

Consider the following languages: I. {ambncpdq ∣ m + p = n + q, where m, n, p, q ≥ 0} II. {ambncpdq ∣ m = n and p = q, where m, n, p, q ≥ 0} III. {ambncpdq ∣ m = n = p and p ≠ q, where m, n, p, q ≥ 0} IV. {ambncpdq ∣ mn = p + q, where m, n, p, q ≥ 0} Which of the above languages are context-free?


I and IV only


I and II only


II and III only


II and IV only


Please comment below if you find anything wrong in the above post
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