The question tests your knowledge of the current power generation in India, specifically the installed electricity generation capacity and actual electricity generation.

Option 1 states that the installed electricity generation capacity is 100000 MW. This is not correct, as the current installed capacity is much more than 100000 MW.

Option 2 claims that the actual electricity generation is 660 billion kWh. This is correct because recent sources show that the electricity generation in India is indeed in this range.

Option 3 suggests that both statements are correct, but since we`ve established that option 1 is not accurately reflected, this option is also incorrect.

And option 4 posits that neither statements are accurate. However, given that statement 2 is correct, this option is incorrect.

Therefore, option 2 is the most accurate answer to the question.