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Two equal negative charges are fixed at the points \( [0, \mathrm{a}] \) and \( [0,-\mathrm{a}] \) on the \( y \)-axis. A positive charge \( \mathrm{Q} \) is released from rest at the points \( [2 a, 0] \) on the \( \mathrm{x} \)-axis . The charge \( \mathrm{Q} \) will
\( \mathrm{P} \)
(A) execute simple harmonic motion about the origin
(B) move to the origin and remain at rest
W
(C) move to infinity
(D) execute oscillatory but not simple harmonic motion.
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