What happens when potassium chromate reacts with dilute nitric acid?

• A
  $Cr^{3+}$ and $Cr_2O_7^{2-}$ are formed.
• B
  $Cr_2O_7^{2-}$ and $H_2O$ are formed.
• C
  $Cr_2O_7^{2-}$ and $Cr^{3+}$ oxidation state.
• D
  $Cr_2O_7^{2-}$ is the oxidized form of $Cr$ in $+7$ state.