The velocity of light in a medium depends on

electric and magnetic properties of the medium

The correct answer is Option (1) → electric and magnetic properties of the medium

Explanation:

The velocity of light in a medium is given by

$ v = \frac{1}{\sqrt{\mu \varepsilon}} $

where $ \mu $ is the magnetic permeability and $ \varepsilon $ is the electric permittivity of the medium.

Hence, the velocity of light depends on both electric and magnetic properties of the medium.