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MCQ (More than One Correct Answer)
GATE CSE 1999
If L1 is a context free language and L2 as a regular language, which of the following is/are False?
a. L1-L2 is not context free
b. L1 ∩ L2 is context free
c. ~L1 is context free
d. ~L2 is regular(A) Only b(B) Only c(C) Both a and c(D) Both b and c
