A) \[A{{l}_{2}}{{O}_{3}}\]
B) \[HBr\]
C) \[BN\]
D) \[SiC\]
Correct Answer: D
Solution :
Silicon carbide \[(SiC)\] is also known as carborundum. It is hardest substance next only to diamond. It is used in cutting tools and as abbrassive.
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