Which statement(s) about coordination of cation is/ are true?

A few metal ions display multiple coordination numbers. As a result, statement A is untrue.
The number of ligands in a coordination compound that are directly bound to the main metal atom or ion is known as the coordination number. Here, a sigma bond holds the monodentate ligand to the metal. As a result, statement B is untrue.
The propensity to surround the metal atom with the same amount of electrons as one of the rare gases determines the coordination number. There are also a number of other elements. As a result, choice C is incorrect.
The charge on a metal ion, the charge on the ligand, the relative sizes of the metal ion and the ligands, and other factors affect the coordination number of a metal ion