The work done in taking a unit positive charge from P to A is WA and from P to B is WB. Then

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WA > WB

WA < WB

WA= WB

WA + WB = 0

answer is C.

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Detailed Solution

As potential at A and B is the same, VA = VB = kQ/d. So work done in both the cases will be the same.

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