Which of these expressions will make the rightmost set bit zero in an input integer x?

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Question:Which of these expressions will make the rightmost set bit zero in an input integer x?

1. x = x | (x-1)

2.x = x & (x-1)

3.x = x | (x+1)

4.x = x & (x+2)

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  1. Which of these expressions will make the rightmost set bit zero in an input integer x?
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