Two spheres of radii r and r carry charges q and q respectively. When they are connected by a wire, there will be no loss of energy of the system if:
a) q on the first sphere is 4q on the second sphere.
b) q on the first sphere is 2q on the second sphere.
c) q on the first sphere is q on the second sphere.
d) q on the first sphere is 3q on the second sphere.