Oxidation states of the metal in the minerals haematite and magnetite,respectively,are

• A
  $II, III$ in haematite and $III$ in magnetite
• B
  $II, III$ in haematite and $II$ in magnetite
• C
  $II$ in haematite and $II, III$ in magnetite
• D
  $III$ in haematite and $II, III$ in magnetite