Among the various allogropes of carbon

1 Diamond is the hardest, lamp black is the softest

2 Diamond is the hardest, coke is the softest

3 Coke is the hardest, graphite is the softest

4 Diamond is the hardest, graphite is the softest



Among the various allogropes of carbon 1 Diamond is the hardest, lamp black is the softest 2 D..

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(4) Diamond is the hardest, graphite is the softest

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