Correct option is B
A reluctance motor is an unexcited single-phase synchronous motor.
It operates by the principle of reluctance, where the rotor aligns itself in such a way that it presents the least magnetic reluctance to the magnetic field generated by the stator.
The rotor does not require any external excitation or winding, making it unexcited. Reluctance motors are known for their simplicity and are used in applications requiring constant speed.
Application of Reluctance motor:
Timing devices
Signaling devices
Recording instruments
Control apparatus
