1.

Consider the following languages.L1 = {0p 1q 0r | p, q, r ≥ 0}L2 = {0p 1q 0r | p, q, r ≥ 0, p ≠ r}Which one of the following statements is FALSE?

A. L2 is context-free.
B. L1 ∩ L2 is context-free.
C. Complement of L2 is recursive.
D. Complement of L1 is context-free but not regular
Answer» E.


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