In the arrangement shown in figure there are two coils wound on a non conducting cylindrical rod initially the key is not inserted. Then the key is inserted and later removed then

Options

A. the deflection in the galvanometer remains zero throughout
B. there is a momentary deflection in the galvanometer but it dies out shortly and there is not effect when the key is removed.
C. there are momentary galvanometer deflections that die out shortly, the deflection are in the same directon.
D. there are momentary galvanometer defletion that die out shortly, the deflection are in the opposite directions.