If L1 and L2 are context free language and R a regular set, then which – McqOptions

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1.	If L1 and L2 are context free language and R a regular set, then which one of the languages below is not necessarily a context free language?
A.	L1 L2
B.	L1 ∩ L2
C.	L1 ∩ R
D.	L1 ∪ L2
Answer» C. L1 ∩ R

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