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Answer

Correct Option is 1 and 3 only

Answer explanation : The Precambrian rocks of India have been classified into two systems, namely the Dharwar system and the Archaean system. The rocks of the Dharwar system are mainly sedimentary in origin, and occur in narrow elongated synclines resting on the gneisses found in Bellary district, Mysore and the Aravalli’s of Rajputana. These rocks are enriched in manganese and iron ore which represents a significant resource of these metals.

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