Multiple choice Which of the following sets represents ferromagnetic elements/molecules only? MnS, NiO, Fe, Co Fe, Co, MnO, MnS MnS, NiO, Co, Ni Fe, Co, Ni, CrO2 Cr, MnO, MnS, NiO Reveal answer Fill a bubble to check yourself D Correct answer Explanation Fe, Co, Ni and CrO2 all are ferromagnetic elements/molecules.