PbS can be separated from ZnS by electrostatic separation method. The property on which this method is based on, is

The correct option is A PbS is a good conductor and ZnS is a poor conductor of electricity

In electrostatic method, one component should be good conductor and one should be poor or non conductor of electricity.

Here PbS is a good conductor and ZnS is a poor conductor of electricity.

So, option A is correct.