Which of the following languages is accepted by a non-deterministic pushdown…

GATE · 2006 · IT

Which of the following languages is accepted by a non-deterministic pushdown automaton (PDA) but NOT by a deterministic PDA?

  1. A.

    {anbncn ∣ n≥0}

  2. B.

    {albmcn ∣ l≠m or m≠n}

  3. C.

    {anbn ∣ n≥0}

  4. D.

    {ambn∣ m,n≥0}

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