Which of the following descriptions regarding magnetic behavior is correct?

1. A
   ${\text{O}}_2^{+},{\text{O}}_2^{-}$ — Both paramagnetic
2. B
   $\text{O},{\text{O}}_2^{2-}$ — Both paramagnetic
3. C
   ${\text{O}}_2^{-},{\text{O}}_2^{2-}$ — Both diamagnetic
4. D
   ${\text{O}}^{+},{\text{O}}_2^{2-}$ — Both paramagnetic