[More than 90% of India’s ...] Which one of the following is the appropriate reason for considering the Gondwana rocks as most impo

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Which one of the following is the appropriate reason for considering the Gondwana rocks as most important of rock systems of India?

More than 90% of limestone reserves of India are found in them.

More than 90% of India’s coal reserves are found in them.

More than 90% of fertile black cotton soils are spread over them.

None of the reasons given above is appropriate in this context.

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