Which of the following are amphoteric oxides?
$Mn_2O_7, CrO_3, Cr_2O_3, CrO, V_2O_5, V_2O_4$

  • A
    $Mn_2O_7, CrO$
  • B
    $CrO_3, V_2O_4$
  • C
    $V_2O_5, Cr_2O_3$
  • D
    $Cr_2O_3, Mn_2O_7$

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