Question

plzz explain this with reason​

Answer 1

best stability is directly proportional to its bond order that is if the bond order of the atom is more than this atom will be more stable and we can find the bond order by writing the MO configuration of the atom.
Bond order
O2 = 2.5
O2+ = 2
O2- = 1.5
O2 2- = 1
so the order of stability will be
according to A