Which metal(s) has/have a typical metallic structure?

The elements with unpaired electrons are known as transition elements.
The creation of solid metallic bonding is aided by the empty orbits in their outermost shell.
Due to their densely packed structures, transition metals have high melting and boiling temperatures.
The transition elements establish an increasing number of covalent bonds as the number of unpaired electrons rises.
Zn, Cd, Hg, and Mn lack typical metallic characteristics because they contain entire d-orbitals and no covalent bonds.

Hence, the correct option is (a, b, c,d).