Which of the following are decidable ?1. whether the intersection of two regular language is infinite.2. whether a give context free language is regular3. whether two push down automata accept the same language.4. whether a given grammar is context free

Which of the following are decidable ?1. whether the intersection of t

1.	Which of the following are decidable ?1. whether the intersection of two regular language is infinite.2. whether a give context free language is regular3. whether two push down automata accept the same language.4. whether a given grammar is context free
A.	1 and 2
B.	1 and 4
C.	2 and 3
D.	2 and 4
Answer» C. 2 and 3

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Which of the following are decidable ?1. whether the intersection of two regular language is infinite.2. whether a give context free language is regular3. whether two push down automata accept the same language.4. whether a given grammar is context free

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