The set in which all the species are diamagnetic is

A

$$\text{B}_2$$, $$\text{O}_2$$, NO

B

$$\text{O}_2$$, $$\text{O}_2^+$$, CO

C

$$\text{N}_2$$, $$\text{O}_2^-$$, $$\text{CN}^-$$

D

$$\text{C}_2$$, $$\text{O}_2^{2-}$$, $$\text{NO}^+$$