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
The following separation technique depends on the molecular size of the protein : 
Select and explain. 
A. Chromatography on a carboxymethyl (CM) cellulose column, B. Iso-electric focussing, C. Gel filtration chromatography, D. Chromatography on a diethylaminoethyl (DEAE) cellulose column
C: Gel filtration chromatography
Answer: C: Gel filtration chromatography 
Explanation: C i.e. Gel filtration Chromatography