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The major use of limestone is ____________

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The major use of limestone is ____________

(a) Primary source material for manufacture of Portland cement

(b) Used in metallurgical industries as flux

(c) Used as building stone

(d) Used as a source of magnesium

This question was posed to me in exam.

My question comes from Important Sedimentary Rocks topic in division The Study of Rocks of Engineering Geology

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The correct answer is (a) Primary source material for manufacture of Portland cement

The best explanation: Limestones and dolomites find important applications in many industries and engineering practice. Thus, limestone is a primary source material for manufacture of Portland cement and for a variety of limes.

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