Identify homoleptic complex from following.

A homoleptic complex is a coordination compound in which the central metal atom or ion is bonded to only one type of ligand.

Bis(ethylenediamine)dithiocyanatoplatinum(IV) contains two types of ligands: ethylenediamine and thiocyanate. It is a heteroleptic complex.

Tetraamminecopper(II) ion contains only one type of ligand: ammine (NH_3$). It is a homoleptic complex.<br><br>Triamminetrinitrocobalt(III) contains two types of ligands: ammine and nitro. It is a heteroleptic complex.<br><br>Triamminetrithiocyanatorhodium(III) contains two types of ligands: ammine and thiocyanate. It is a heteroleptic complex.<br><br>Answer: Tetraamminecopper(II) ion$