Concentrated hydrochloric acid is oxidised by manganese(IV) oxide, $\text{MnO}_2$. Which two substances are produced in this reaction?
- A$\text{Mn}^{2+}$ and $\text{Cl}^-$
- B$\text{Mn}^{2+}$ and $\text{Cl}_2$
- C$\text{Mn}^{6+}$ and $\text{Cl}^-$
- D$\text{Mn}^{6+}$ and $\text{Cl}_2$