The inexhaustive, nonconventional source of energy is/are
The correct option is
D
All of these
The resources which are available in nature in an unlimited amount are known as inexhaustible resources. These resources can be replenished again and again for use. The resources which can be renewed and are safe to use are known as non-conventional sources of energy. Solar radiations, wind power and sea tides are used for the generation of the electricity. These are inexhaustive and non-conventional resources.