If L1 and L2 are context free languages and R a regular set, one of the…
GATE · Computer Science · 1996
If L1 and L2 are context free languages and R a regular set, one of the languages below is not necessarily a context free language, which one?
- A.
L1 . L2
- B.
L1 ∩ L2
- C.
L1 ∩ R
- D.
L1 ∪ L2
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