Which among the following elements is paramagnetic

Options

A. `KO_(2)`
B. `K_(2)O_(2)`
C. `K_(2)O`
D. `NO_(2)`

Answer

A, D

Explanation

Due to the presence of unpaired electron on `O^(2)` ion in `KO^(2)` and ‘N’ in `NO^(2)` (odd electron bond)