Concept:A galvanometer deflects only when the magnetic flux through the solenoid changes, inducing a current.
Explanation:The magnet and solenoid are initially at rest along the same axis.
With no relative motion between them, the magnetic field lines passing through the solenoid remain constant.
A steady magnetic flux produces no induced electromotive force in the coil.
Therefore, no current flows and the galvanometer pointer shows no deflection.
If the magnet moves towards or away from the stationary solenoid, flux changes and deflection occurs.
Similarly, moving the solenoid away from the stationary magnet also changes the flux, causing deflection.
The only situation with zero induced current is when there is no relative motion between the magnet and the solenoid.
Answer:B. there is no relative motion.