The following are some statements about transition elementsi) IIB group belong to transition elementsii) In these elements last two shells ns and (n-1)d are partially fillediii) They show variable valencies

i) IIB group elements (Zn,Cd,Hg) (or) 12th group are not transition elements.ii) In transition elements ns and (n-1)d shells are incompletely filled.iii) Transition elements show  variable valenies .     therefore , ii and iii are correct