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Two equal negative charges -q are fixed ...

Two equal negative charges -q are fixed at points (0, -a) and (0,a) on y-axis. A poistive charge Q is released from rest at point (2a, 0) on the x-axis. The charge Q will

A

execute simple harmonic motion above the origin

B

move to the origin and remain at rest

C

execute oscillatory but not simple harmonic motion

D

move to infinity

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