Two lightweight metal spheres are suspended near each other from insulating threads. One sphere has a net charge; the other sphere has no net charge. The spheres will:

AAttract each other
BExert no electrostatic force on each other
CRepel each other
DDo any of these things depending on the sign of the charge on the one sphere

Verified Answer :

In an experiment, the non-charged balloon moves towards the charged rod. this is applicable with the spheres.
Suppose the sphere is positively charged, the neutrally charged sphere becomes is negatively charged. The positively charged sphere causes the other sphere to be polarized, with negative charge on the side closest to the first sphere. Now the second sphere moves towards the first sphere. answer is A.