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Question

Diatom frustule is made of

A
Silica
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B
Calcium carbonate
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C
Calcium hydroxide
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D
Both B and C.
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Solution

The correct option is B Silica
A frustule is the hard and porous cell wall or external layer of diatoms. It is made of silicic acid and covered with a layer of organic substance.
So, the correct answer is 'Silica'

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