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MCQ

An item that is read as input can be either pushed to a stack and later popped and printed, or printed directly. Which of the following will be the output if the input is the sequence of items 1, 2, 3

1, 5, 2, 3, 4

3, 4, 5, 2, 1

3, 4, 5, 1, 2

5, 4, 3, 1, 2

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