Following are the sources of electricity generation in India. Arrange them in correct sequence on the basis of total power generation capacity (higher to lower):

(A) Nuclear
(B) Thermal
(C) New and renewable energy
(D) Hydro

Choose from the options given below:

The correct option is (B), (D), (C), (A).

To arrange the sources of electricity generation in India in descending order of their total power generation capacity (from higher to lower), we can analyze the contribution of each sector:
1. Thermal Power (B): This is the largest source of electricity in India, comprising coal, lignite, gas, and diesel-based power plants. It accounts for the majority of India's total installed capacity.
2. Hydro Power (D): Hydroelectric power projects represent the next major share of generation capacity in conventional energy sources, historically holding a significant portion of the total capacity.
3. New and Renewable Energy (C): This includes solar, wind, biomass, and small hydro projects. While growing rapidly, it has historically followed thermal and large hydro power in terms of established capacity.
4. Nuclear Power (A): Nuclear energy contributes the smallest share to the country's grid compared to the other three sources.

Therefore, the correct sequence from higher to lower capacity is Thermal (B) ⇒ Hydro (D) ⇒ New and renewable energy (C) ⇒ Nuclear (A).