The correct options are
A O2
B F2
C NO
NO, O2 and F2 are stabilized by removal of electron due to increase in the bond order.
CN is destabilized by removal of electron due to decrease in the bond order.
The bond order of NO increases from 2.5 to 3 when an electron is removed.
The bond order of O2 increases from 2 to 2.5 when an electron is removed.
The bond order of F2 increases from 1 to 1.5 when an electron is removed.
The bond order of CN decreases from 2.5 to 2 when an electron is removed.