Correct option is C
· Mutual inductance is a measure of the ability of one coil to induce an electromotive force (EMF) in another nearby coil when the current in the first coil changes.
· The unit of mutual inductance is the Henry (H), which is the same unit used to measure inductance in general.
· One Henry is defined as the amount of inductance required to produce an EMF of one volt when the current changes at the rate of one ampere per second.