1.

Consider the following languages: L1 = {anbmcn : m, n >= 1} L2 = {anbnc2n : n >= 1} Which one of the following is TRUE?

A. Both L1 and L2 are context-free.
B. L1 is context-free while L2 is not context-free
C. L2 is context-free while L1 is not context-free
D. Neither L1 nor L2 is context-free
Answer» C. L2 is context-free while L1 is not context-free


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