The correct option is C They may be exhaustible or inexhaustible.
Natural resources are either exhaustible or inexhaustible.
- Exhaustible natural resource are present in minimum quantity. They cannot be readily replaced by natural means as compared to their consumption. These resources are not eco-friendly as they cause pollution. Example: coal and petroleum.
- Inexhaustible natural resources are present in infinite quantity and will not deplete throughout the existence of Earth. These resources are eco-friendly.
Example: wind, solar energy etc.