A point charge -q is carried from a point A to another point B on the axis of a charged ring of radius r carrying a charge +q. If the point A is at a distance `4/3` r from the centre of the ring and the point B is `3/4` r from the centre but on the opposite side, what is the net work that need to be done for this?

Options

A. `-7/5(q^(20)/(4piepsilon_(0)r))`
B. `-1/5(q^(2))/(4piepsilon_(0)r)`
C. `7/5(q^(2))/(4piepsilon_(0)r)`
D. `1/5(q^(2))/(4piepsilon_(0)r)`