How to check
@Siddhartha-Ghosh a dimagnetic species is one in which all the electrons are paired that is the total number of electrons is even. A paramagnetic species has unpaired electrons that is it has odd number of electrons. However there is an exception. Species having the total number of electrons as 10 and 16 are paramagnetic. In this only O3 has even number of electrons which means that it is diamagnetic. The rest have odd number of electrons which means they are paramagnetic.
@om-vaykul-0 Thank You