Among the various allotrope of carbon
  • 1Coke is the hardest, graphite is the softest
  • 2Diamond is the hardest, coke is the softest
  • 3Diamond is the hardest, graphite is the softest
  • 4Diamond is the hardest, lamp black is the softest
Answer:- 1
Explanation:-

Solution:
Diamond is the hardest, coke is the softest.

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