Homoleptic complex from the following complexes is :
Potassium trioxalatoaluminate (III)
Diamminechloridonitrito-N-platinum (II)
Pentaamminecarbnonatocobalt (III) chloride
Triamminetriaquachromium (III) chloride
Class XII NCERT Coordination compounds
In complex of 2,3,4 two or more types of ligands are present hence they are heteroleptic complexes.