Which regular expressions belong to R where R=ab*cb*R=ab*+cb*?
- ab
- abb
- cb
- All of these
Explanation
Now let's evaluate the options:
(A) ab: This string matches (since allows for one 'b'). So, this belongs to
(B) abb: This string also matches (since allows for two 'b's). So, this belongs to .
(C) cb: This string matches (since allows for one 'b'). So, this belongs to .
(D) All of these: Since all the previous options (A, B, C) belong to , this is correct.
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