Explanation:

None of them uses seawater: This is incorrect. Many coal-based thermal power plants, especially those located near the coast, use seawater for cooling purposes. This is known as once-through cooling, where seawater is passed through the plant and returned to the sea.

None of them is set up in water-stressed district: This is also incorrect. Some coal-based thermal power plants are indeed set up in water-stressed regions, leading to competition for water resources between the plants and local communities.

None of them is privately owned: This statement is also incorrect. There are numerous privately-owned coal-based thermal power plants in India.

Given that all three statements are incorrect, the correct option is "None".