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Rank of a Matrix

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Question

For problems X and Y, Y is NP-complete and X reduces to Y in polynomial time. Which of the following is TRUE?

A

X is in NP, but not necessarily NP-complete

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B

X is NP-hard

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C

If X can be solved in polynomial time, then so can Y

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D

X is NP-complete

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Solution

The correct option is D X is NP-complete
X is reducible to NPC. Hence X is also NPC.

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