A can be A-> derivable if and only if __________ – McqOptions

MCQOPTIONS

1.	A can be A-> derivable if and only if __________
A.	A-> A is actually a production
B.	A->B, B-> A exists
C.	Both (a) and (b)
D.	None of the mentioned
Answer» B. A->B, B-> A exists

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