AIIMS 2018 Physics Drift Velocity Assertion Reason Question

The assertion is true because a current indeed flows in a conductor only when an electric field is present, which causes charge carriers (typically electrons) to drift, resulting in current. However, the reason is false; the drift velocity of electrons actually increases in the presence of an electric field, not decreases. Option A is incorrect because the reason does not correctly explain the assertion. Option B is also incorrect as it states both are true, which is not the case. Option D is incorrect since the assertion is true.