Explanation:

The main winding and starting winding of a single-phase induction motor are connected in different ways depending on the type of motor.

Types of Single-Phase Induction Motors:

1. Split Phase Induction Motor:
The split-phase induction motor has two windings, a main winding, and a starting winding. These two windings are connected in parallel across the supply. The starting winding is made of a finer wire, and it has more turns than the main winding. The starting winding is also connected in series with a centrifugal switch, which disconnects it from the supply when the motor reaches about 75% of its rated speed. The split-phase induction motor is used for low-power applications where the starting torque requirement is low.

2. Capacitor Start Induction Motor:
The capacitor start induction motor is similar to the split-phase induction motor, but it has a capacitor in series with the starting winding. The capacitor is used to improve the starting torque of the motor. When the motor starts, the capacitor is disconnected from the starting winding using a centrifugal switch. The capacitor start induction motor is used for moderate power applications where the starting torque requirement is moderate.

3. Capacitor Start Capacitor Run Induction Motor:
The capacitor start capacitor run induction motor has two capacitors, one in series with the starting winding and the other in series with the running winding. The starting capacitor is used to provide high starting torque, and the running capacitor is used to improve the running efficiency of the motor. Both capacitors are connected in parallel across the supply. The centrifugal switch is used to disconnect the starting capacitor from the supply when the motor reaches about 75% of its rated speed. The capacitor start capacitor run induction motor is used for high-power applications where the starting torque requirement is high.

Conclusion:
Therefore, the answer to the given question is 'D' - none of the above, as the connection of the main winding and starting winding of a single-phase induction motor depends on the type of motor.

B. main winding and auxiliary winding are connected in parallel across the supply