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» `NA^(+) and BaO_(2)` `KO_(2) and AlO_(2)^(-)` `KO_(2)` only `BaO_(2)` only Answer :C