Let L be a language over Sigma = {a, b}. Which of the following statements is…

GATE · 1996 · CS · Question 1 subparts

Let L be a language over Sigma = {a, b}. Which of the following statements is true?

  1. A.

    L = {x | x has an equal number of a and b symbols} is regular

  2. B.

    L = {a^n b^n | n >= 1} is regular

  3. C.

    L = {x | x has more a symbols than b symbols} is regular

  4. D.

    L = {a^m b^n | m >= 1, n >= 1} is regular

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