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
In chromatography mass movements of the substances is due to: 
Select and explain. 
A. Diffusion, B. Electrophoresis, C. Paper chromatography, D. Osmosis
A: Diffusion
Answer: A: Diffusion 
Explanation: A i.e. Diffusion