Among KO_(2), AlO_(2)^(-), BaO_(2) and NO_(2)^(+), unpaired electron is present in …………

Among KO_(2), AlO_(2)^(-), BaO_(2) and NO_(2)^(+), unpaired electron i

1.	Among KO_(2), AlO_(2)^(-), BaO_(2) and NO_(2)^(+), unpaired electron is present in …………
Answer» `NO_(2)^(+) and BaO_(2)` `KO_(2) and AlO_(2)^(-)` `KO_(2)` only `BaO_(2)` only ANSWER :C