Explanation:

Here's how it breaks down:

- Suratgarh Thermal Power Station

This is in Rajasthan and it’s actually the biggest of the lot. The installed capacity sits at about 2,820 MW. That’s a good chunk higher than the others on this list.

- Kalisindh Thermal Power Plant

This one's in Jhalawar district of Rajasthan. Its installed capacity is 1,200 MW. A smaller site, definitely not the largest.

- Chhabra Thermal Power Plant

Also in Rajasthan. Current installed capacity is about 1,320 MW. Again, lower than Suratgarh.

- Kota Super Thermal Power Plant

This is one of the older ones, and it's pretty important locally, but the installed capacity is around 1,240 MW.

So, the clear winner for highest installed capacity is:

Option:1, Suratgarh