This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'The following separation technique depends on the molecular size of the protein : \nSelect and explain. \nA. Chromatography on a carboxymethyl (CM) cellulose column, B. Iso-electric focussing, C. Gel filtration chromatography, D. Chromatography on a diethylaminoethyl (DEAE) cellulose column', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Gel filtration Chromatography', 'role': 'assistant'}]