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B
Modern clocks
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C
Chromatography
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D
Ornamental Objects
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Solution
The correct option is C
Chromatography
1.Zeolite is used in removal of hardness of water and in chromatography. 2.Sand is used in preparation of glass. 3.Quartz is used in modern clocks. 4.Zircon and topaz is used for making ornamental objects.