When graphite is subjected to an electric arc in the presence of an inert atmosphere,it gives:

  • A
    $C_{70}$ as main product and $C_{80}$ in small quantities
  • B
    $C_{60}$ as main product and $C_{70}$ in small quantities
  • C
    $C_{50}$ as main product and $C_{60}$ in small quantities
  • D
    equal amounts of $C_{60}$ and $C_{70}$

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