Which one of the following transition metal ions shows magnetic moment of 5.92 BM

Magnetic moment = n(n+2)=5.92 i.e., n=5Number of unpaired electrons in Mn2+=5Number of unpaired electrons in Ti3+=1Number of unpaired electrons in Cr3+=3Number of unpaired electrons in Cu2+=1Number of unpaired electrons in Co2+=3Thus Mn2+ have magnetic moment =5.92BM