Discussion
Assertion (A): A cement works is almost always sited beside its limestone quarry.
Reason (R): Limestone forms the great majority of the raw mix and is expensive to transport.
Answer: B
Both are true and the reason gives the economics: moving several tonnes of stone for every tonne of cement produced would dominate the cost, so the plant goes to the deposit rather than the deposit to the plant. Fuel and corrective materials, needed in far smaller quantities, are brought in instead.
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