In coulomb's law, on what factors does the value of electrostatic force constant K depend ?

Options

A. The value of K depends on nature of medium separating the charges and on the system of units.
B. The value of K depends on nature of medium only
C. The value of K depends on nature of medium separating the charges and on the system of units.
D. The value of K depends on separating the charges.

Answer

C