Glass is made from the mixture of ______.
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Quartz and Mica
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Sand and Salt
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Sand and Silicates
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None of these
C
Correct answer
Explanation
Glass is primarily made from sand (silica) and silicates (option C). The main ingredient in glass production is silicon dioxide (SiO2) found in sand, combined with various silicate compounds. Option A is incorrect because quartz is a form of silica itself, not combined with mica. Option B is incorrect because salt is not a standard glass ingredient.