MCQ
Q.
Which of following statement(s) is/are not correct? (I) Languages generated by the grammar S?aSa ? aa is not regular. (II) Languages generated by the grammar S?aSb ? aa is not regular. (III) Languages generated by the grammar S?S1|S3, S1?aS1c |S2|?, S2?aS2b|?, S3?aS3b|S4| ?, S4?bS4c|? is {a^nb^mc^k | k = |n - m|, n?0, m?0, k?0}. (IV) Languages generated by the grammar S?S1S3, S1?aS1c |S2|?, S2?aS2b|?, S3?aS3b|S4| ?, S4?bS4c|? is {a^nb^mc^k | k = |n - m|, n?0, m?0, k?0}.
Correct Answer: B