The correct answer is Option 1. Key Points Madras Aluminium Company Ltd. (MALCO), Mettur: It was set up at Mettur near the Salem district of Tamil Nadu in 1965. Hence pair (a) is NOT correctly matched. It obtains bauxite from the Shevaroy Hills and electricity from the Mettur Hydel Project. Bharat Aluminium Company Ltd. (BALCO), Korba: This is a public sector company which set up its plant at Korba (Bilaspur District, Chhattisgarh) in 1965. Hence pair (b) is correctly matched. It obtains bauxite from the Amarkantak (Shandol District of Madhya Pradesh) and electricity from the Korba Thermal Power Plant. Hindustan Aluminium Corporation Ltd. (HINDALCO), Renukoot: It was set up at Renukoot, about 160 km south of Mirzapur, in 1958. Hence pair (c) is correctly matched. It obtains bauxite from Lohardaga (Jharkhand and Amarkantak region of Madhya Pradesh), and power from the Rihand Dam. Indian Aluminium Company Ltd. (INDAL), Hirakud: Hence pair (d) is correctly matched. It started production in 1938 as a private company and was converted into a public company in 1944. It is an integrated plant having three units at five different places for the production of alumina and aluminium sheets. The plants for the extraction of alumina from bauxite are located at Muri (Jharkhand), near the bauxite mines.