Four separate sets of oxides are given below. 1 $\text{MgO}$ $\text{FeO}$ $\text{CuO}$ 2 $\text{CaO}$ $\text{SO}_2$ $\text{TiO}_2$ 3 $\text{PbO}$ $\text{CaO}$ $\text{Cl}_2\text{O}$ 4 $\text{NO}_2$ $\text{Br}_2\text{O}$ $\text{P}_2\text{O}_5$ Which statement about these oxide groups is correct?
- A1, 2 and 3 contain basic oxides only.
- B2, 3 and 4 contain basic oxides only.
- C1 contains basic oxides only, and 4 contains acidic oxides only.
- D1 contains acidic oxides only, and 4 contains basic oxides only.