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Consider the following statements about the context free grammar G = {S-->SS , S-->ab , S-->ba , S-->^} I. G is ambiguous II. G produces all strings with equal number of a

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Which of the following statement is correct?
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Which of the following sentences can be generated by

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Consider the following statements about the context free grammar G = {S-->SS , S-->ab , S-->ba , S-->^} I. G is ambiguous II. G produces all strings with equal number of a
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Let P be a regular language and Q be context-free language such that Q 	\subseteq P. (For example, let P be the language represented by the regular expression p*q* and Q be {pnqn|n \in N}). Then which of the following is ALWAYS regular?
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