Which of these expressions will return true if the input integer v is a power of two?

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Question:Which of these expressions will return true if the input integer v is a power of two?

1.(v | (v + 1)) == 0;

2.(~v & (v – 1)) == 0;

3.(v | (v – 1)) == 0;

4.(v & (v – 1)) == 0;

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  1. Which of these expressions will return true if the input integer v is a power of two?
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