Two identical charged spheres suspended from a common point by two massless strings of length $l$ are initially a distance $d(d <<1)$ apart because of their mutual repulsion. The charge begins to leak from both the spheres at a constant rate. As a result the charge approach each other with a velocity v. Then as a function of distance x between them,

Question

( A ) v $\propto$ x$^{-1/2}$
( B ) v $\propto$ x
( C ) v $\propto$ x$^{1/2}$
( D ) v $\propto$ x$^{-1}$