The elements of the three transition series of the d - block are given below:
In any transition series, as we move form left to right, the d - orbitals are progressively filled and their properties vary accordingly.
Which element do you expect to have the highest melting point?
The correct option is B W
Look for the one having the strongest metallic bonding. Again, this is a function of the number of unpaired electrons! W tops the list here and thus has the highest melting point.