Assertion (A) : Basalt is a fine grained and dark coloured igneous rock which is formed below the earth’s surface. Reason (R) : The rate of cooling and solidification of magma inside the earth is very slow. Codes

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Assertion (A) : Basalt is a fine grained and dark coloured igneous rock which is formed below the earth’s surface. Reason (R) : The rate of cooling and solidification of magma inside the earth is very slow. Codes