Explanation:

Pair 1 is not correctly matched: Raja Lakhamagouda dam, also known as Hidkal dam, is a dam constructed across the Ghataprabha River in the Krishna River basin. It is situated at Hidkal village in Hukkeri Taluk of Belagavi district in North Karnataka.

Pair 2 is correctly matched: Gandhisagar Dam is located in the Mandsaur, districts of the state of Madhya Pradesh. The Dam is constructed on the Chambal River.

Pair 3 is not correctly matched: The Indira Sagar Dam is the largest dam in India, in terms of volume of water stored in the reservoir. It is located on the Narmada River at the town of Narmada Nagar, Punasa in the Khandwa district of Madhya Pradesh in India.

Pair 4 is not correctly matched: Maithon is located on the banks of river Barakar. The Maithon Dam is located about 48 kms from the Coal City of Dhanbad, Jharkhand.