<prompt> A chromatographic technique which separates one protein from another based on the difference in their size isSize exclusion chromatographyIon-exchange chromatographyHydrophobicityAffinity chromatography  <response>: Chromatographic techniques separate one protein from another based on the difference in their size size exclusion chromatography, charge ion-exchangechromatography, hydrophobicity hydrophobic interaction chromatography, or ability to bind a specific ligand affinity chromatography.Ref: Harper;s Biochemistry; 30th edition; Chapter 4; Proteins: Determination of Primary Structure 