The primary valency of the central transition metal ion in a complex compound [Cr(NH₃)₄Cl₂]Cl

Given, Complex compound
We need to find The primary valency of the central transition metal ion in a complex compound [Cr(NH₃)₄Cl₂]Cl, form the given option

In contrast to valency, which is the maximum number of electrons an atom can lose, gain, or share in order to become stable, oxidation number refers to the charge of the centre atom in a coordination compound if all bonds surrounding that atom were ionic bonds.