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Two fixed point charges +4q and +q units...

Two fixed point charges `+4q` and `+q` units are separeted by a distance 'x'. Where should a third point charge- `q_0` be placed for it to be in equilibrium?

A

Midway between the charges `+4q` and `+q`

B

at a distance `2x` from the charge `+4q`

C

at a distance `(2x)/3` from the charge `+4q`

D

`at a distance `x/3` from the charge `+4q`

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