Correct order of M.P in transition element is 

More is the unpaired electrons (free electrons), more is the melting point. 

• Cr has maximum number of unpaired electrons, therefore its melting point is higher than Ti and V. Ti has more number of unpaired electrons than V, Therefore, Ti has a higher melting point than V.

                                                   Cr>Ti>V

• Cr has the highest melting point because of having free electrons. The melting point of Fe is more than Mn because Mn has half-filled stable configuration, therefore it is less active towards delocalization of electrons.

                                                 Cr>Fe>Mn

• As the size of atoms increases, the effective nuclear charge on the valence electron also reduces. Hence, it will be easy to melt higher atomic size elements by providing low energy, so melting point of heavy elements is low. Cu size is smaller than Ag and Au. Therefore, Cu has a highest melting point than Au and Ag. Although Au has a larger size Ag yet Au has a high melting point because of having high density. The melting point order will be:

                                                    Cu>Au>Ag