The elements of the three transition series of the d-block are given below `:`
`{:(Sc,Ti,V,Cr,Mn,Fe,Co, Ni,Cu,Zn),(Y,Zr,Nb,Mo,Tc,Ru,Rh,Rd,Ag,Cd),(La,Hf,Ta,W,Re,Os,Ir,Pt,Au,Hg):}`
In any transition, as we move from left to right,the d-orbital sare progressively filled and their properties vary accordingly .
Which element do you expect to have the highest melting point ?
A. La
B. W
C. Os
D. Pt
