question_answer 32)

  The primary origin(s) of magnetism lies in atomic currents Pauli exclusion principle polar nature of molecules intrinsic spin of electron

Answer:

                                                           (a,d)The primary origin of magnetism lies in the fact that the electrons are revolving and spinning about nucleus of an atom, which gives rise to currents and hence to magnetism. Thus, options (a) and (c) are true.