[Pt(NH3)3CI3]+
[Pt(en)3]4+
[Pt(en)2Cl2]2+
[Pt(en)2(NH3)2]4+
The correct option is (A): [Pt(NH3)3CI3]+
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.