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B
cyanogen
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C
silane
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D
silicone
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Solution
The correct option is A carborundum Acheson, in 1890, originally attempted to synthesize artificial diamond, but ended up creating blue crystals of silicon carbide, which he called carborundum.
Thus silicon carbide (SiC), also known as carborundum; exceedingly hard, synthetically produced crystalline compound of silicon and carbon with chemical formula SiC. Option A is correct.