The correct option is D Aluminium smelting plants in the country are located in Odisha and West Bengal alone.
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Aluminium is extracted from its ore called bauxite. Most of the airplanes are made from aluminium which is a light metal. Aluminium is highly malleable and it becomes stronger when mixed with other metals. Aluminium smelting plants in the country are located in Odisha, West Bengal, Kerala, Uttar Pradesh, Chhattisgarh, Maharashtra, and Tamil Nadu.