`N_2` and `O_2` are converted into mono positive cations `N_2^+` and `O_2^+` respectively. Which is in correct
A. In `N_2^+`, the N-N bond is weakened
B. In `O_2^+`, the O-O bond is weakened
C. In `O_2^+` para magnetism increases
D. `N_2^+` becomes diamagnetic