Among the various allotropes of carbon ? – McqOptions

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1.	Among the various allotropes of carbon ?
A.	diamond is the hardest, lamp black is the softest
B.	coke is the hardest, graphite is the softest
C.	diamond is the hardest, coke is the softest
D.	diamond is the hardest, graphite is the softest
Answer» E.

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