In the arrangement shown in figure,there are two coils wound on a non-conducting cylinderical rod.Initially the key is not inserted.Then the key in inserted and later removes.Then,
A. The galvanometer will not deflect B. The galvanometer will deflect in one direction when the key is inserted and in the opposite direction when the keys removed C. The galvanometer will deflect in one direction when the key is inserted and remain still when the key is removed . D. The galvanometer will deflect in one direction when the key is inserted and in the same direction when the key is removed .

Options

A. The galvanometer will not deflect
B. The galvanomter will defiect in one diection when the key is inserted and in the opposite direction when the keyis removed
C. The galvnometer will deflect in one direction when the key is inserted and remain when the key is inserted and remain still when the key is removed .
D. The galvnometer will deflect in one direction when the key is inserted and in the same direction when the key is removed .