Which of the following is a true peroxide

1. Peroxides contain O₂^2- ion
2. Peroxides possess O-O and M-O bonds
3. In peroxides the oxidation number of oxygen is -2
   Eg: H₂O₂,Na₂O₂,BaO₂

→ RbO₂ is super oxide
super oxides contain O₂^-1 ion
Super oxides also possess M-O and O-O bonds
The oxidation number of oxygen in superoxides is -1/2
Eg :- KO₂ , RbO₂
      
→ NO₂ , MnO₂ are normal oxides
In which oxidation number of O 1s (-2)
Normal oxides contains "O^-2 " ion
Normal oxides contains only M-O bonds
Eg: