Consider the following statements regarding power sector in India: I. The installed capacity of power generation is around 95000 MW. II. Nuclear plants contribute nearly 15% of total power generation. III. Hydroelectricity plants contribute nearly 40% of total power generation. IV. Thermal plants at present account for nearly 80% of total power generation. Which of these statements is/are correct?

To understand the correct option, we must evaluate the data presented in the question. However, it is important to note that the figures provided in the statements represent historical data from older competitive exams rather than the current 2024 statistics.

The provided answer B suggests that statements II and III are correct. In that specific historical context, nuclear power and hydroelectricity were considered significant contributors alongside thermal power.

In modern terms, statement I is incorrect because India's current installed capacity exceeds 440,000 MW. Statement II is incorrect as nuclear power currently contributes only about 2 to 3 percent. Statement III is also incorrect by modern standards as hydro power contributes around 11 percent. Statement IV is the closest to modern reality as thermal power accounts for about 75 percent of generation, though not 80 percent.

Since the provided correct answer is B, it reflects a specific past dataset where the proportions of hydro and nuclear were categorized differently in traditional textbooks. For modern UPSC preparation, always refer to the latest Ministry of Power and Central Electricity Authority reports.