Chlorine gas can be prepared by the action of concentrated $$\text{H}_2\text{SO}_4$$ on a mixture of sodium chloride and manganese dioxide. Identify the sets of correct reactions

$$\text{MnO}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{MnSO}_4 + \text{H}_2\text{O} + \frac{1}{2}\text{O}_2$$ 

$$2\text{NaCl} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + \text{Cl}_2 + \text{H}_2$$

$$2\text{NaCl} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + 2\text{HCl}$$ 

$$\text{MnO}_2 + 2\text{HCl} + \text{H}_2\text{SO}_4 \rightarrow \text{MnSO}_4 + \text{Cl}_2 + \text{H}_2\text{O}$$

$$4\text{NaCl} + 4\text{H}_2\text{SO}_4 \rightarrow 4\text{NaHSO}_4 + 4\text{HCl}$$ 

$$\text{MnO}_2 + 4\text{HCl} \rightarrow \text{MnCl}_2 + \text{Cl}_2 + 2\text{H}_2\text{O}$$

$$\text{MnO}_2 + 2\text{NaCl} \rightarrow \text{MnCl}_2 + \text{Na}_2\text{O} + \frac{1}{2}\text{O}_2$$ 

$$\text{MnCl}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{MnSO}_4 + \text{Cl}_2 + \text{H}_2$$