A.B.C.D.List-IPrimary structure of proteinSecondary structure of proteinTertiary structure of proteinQuaternary structure of proteinIII.IV.II.I.List-IIPolypeptide chain with positional information of aminoacidsAlpha helix and β sheet structureHollow woolen ball like structure with hydrogen anddisulphide bondsAssembly of more than one polypeptides, seen in adulthuman haemoglobin Hence, A-III, B-IV, C-II, D-I is the correct match.