What is the voltage of the electricity that is generally supplied to a house ?

Worldwide, many different mains power systems are found for the operation of household and light commercial electrical appliances and lighting.

The different systems are primarily characterized by the following.

 Voltage Frequency

Plugs and sockets (receptacles or outlets)

Earthing system (grounding)

Protection against overcurrent damage (e.g., due to short circuit), electric shock, and fire hazards.

Parameter tolerances.

All these parameters vary among regions.

The voltages are generally in the range

The two commonly used frequencies are

Single-phase or three-phase power is most commonly used today.

In India, a voltage of nearly  volts and a frequency cycles per second is used.

Hence, the  correct option is option C. (  220 V ).