Which of the following is the main component of Cement?

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(b) Lime stone — Cement is a product obtained by combining a material rich in lime, CaO with other material such as clay which contains silica, SiO along with the oxides of aluminum, iron and magnesium. It is also called Portland cement because it resembles with the natural limestone quarried in the Isle of Portland, England.

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(A) Gypsum

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(C) Ash

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(D) Clay

Which of the following is the main component of Cement?

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