This question requires matching the given power stations (List-I) with their respective states (List-II). Let`s analyze each option to determine which one is correct.

Option 1: A-4, B-3, C-2, D-1

According to this option, the power station Kolaghat (A) is in Uttar Pradesh (4), Chandrapur (B) is in Maharashtra (3), Suratgarh (C) is in Rajasthan (2), and Unchahar (D) is in West Bengal (1). However, this option is incorrect because the state mentioned for each power station does not match their actual respective states.

Option 2: A-4, B-2, C-3, D-1

According to this option, Kolaghat (A) is in Uttar Pradesh (4), Chandrapur (B) is in Rajasthan (2), Suratgarh (C) is in Maharashtra (3), and Unchahar (D) is in West Bengal (1). This option is also incorrect because the states mentioned for each power station do not match their actual respective states.

Option 3: A-1, B-3, C-2, D-4

According to