Which of the following grammar rules violate the requirements of an op – McqOptions

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1.	Which of the following grammar rules violate the requirements of an operator grammar ? P, Q, R are nonterminals, and r, s, t are terminals. 1. P Q R 2. P Q s R 3. P 4. P Q t R r
A.	1 only
B.	1 and 3 only
C.	2 and 3 only
D.	3 and 4 only
Answer» C. 2 and 3 only

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