Assertion - Magnetic field interacts with a moving charge and not with a stationary charge.
Reason - A moving charge produces a magnetic field.
A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
C. Assertion is correct but Reason is incorrect
D. Assertion is incorrect but Reason is correct

Hint:When the charge is at rest, it creates an electric field around it and when that charge starts moving, it creates a magnetic field around it. So due to a moving charge magnetic field is produced which exerts a force called magnetic force.

Complete step by step solution:
If a charge q is placed at rest near a metallic wire carrying current I, then the charge experienced almost no force on it. Whereas if a charge q is moving in the direction of the current, then the charge is deflected towards the wire. So we concluded that there must be a field which exerts a force on the charge when it is moving but not when it is at rest.

This field is a magnetic field which is produced by a moving charge. The created magnetic field by the moving charge interacts with the existing field to exert force on the charge. This field is not similar to the electric field which exerts a force on charged particles whether they are at rest or in motion.

Hence the correct option is A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

Note: Stationary charges (or at rest) are related to the phenomena electrostatic. However, moving charge is related to the phenomena dynamics. In the experiment, it was observed that there is a connection between electric and magnetic phenomena.