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General Knowledge General Science Objective

Mar 05, 2013

Among the various allotropes of carbon,

Choose the correct answer:

A) diamond is the hardest, lamp black is the softest

B) diamond is the hardest, graphite is the softest

C) diamond is the hardest, coke is the softest

D) coke is the hardest, graphite is the softest

Detailed Explanation

no explanation

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