Which of the following is paramagnetic ?

In which of the following processes, the bond order has increased and paramagnetic character has changed to diamagnetic?

Given below are two statements:

Statement $(I)$ : A $\pi$ bonding $MO$has lower electron density above and below the inter-nuclear asix.

Statement $(II)$ : The $\pi^*$ antibonding $MO$ has a node between the nucles.In the light of the above statements, choose the most appropriate answer from the options given below:

${N_2}$ and ${O_2}$ are converted into monocations $N_2^ + $ and $O_2^ + $ respectively. Which is wrong

Among the following species$N _{2}, N _{2}^{+}, N _{2}^{-}, N _{2}{ }^{2-}, O _{2}, O _{2}{ }^{+}, O _{2}^{-}, O _{2}{ }^{2-}$ the number of species showing diamagnetism is.