The correct answer is D. 122 kV.
The standard voltage for power supply in India is 11 kV. It is used for both transmission and distribution of electricity. 33 kV and 66 kV are also used for transmission, but they are not as common as 11 kV. 122 kV is not a standard voltage for power supply in India. It is used for some high-voltage transmission lines, but it is not used for distribution.
The standard voltage for power supply in India is 11 kV because it is a good compromise between voltage drop and cost. A higher voltage would result in less voltage drop, but it would also be more expensive to transmit and distribute electricity at a higher voltage. A lower voltage would result in less cost, but it would also result in more voltage drop.
The standard voltage for power supply in India is also consistent with the standard voltage for power supply in other countries. This makes it easier to import and export electricity between countries.