Which is the correct decreasing order of melting points of following…

d-Block elements

The d-block of the periodic table contains the elements in which the d orbitals are progressively filled in each of the four long periods. The d-block elements are also known as transition metals. Originally, the name transition metals was derived from the fact their chemical properties were transitional between those of s- and p-block elements. They show numerous oxidation states. All the transition elements exhibit typical metallic properties such as high tensile strength, ductility, malleability, thermal and electrical conductivity. Another important property of transition metals is their catalytic activity. Transition metals generally have high melting and boiling points. Many d-block elements are colored.