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: Medicine
Separation of cells on basic of specific antigen receptors is done by? 
Select and explain. 
A. Enzyme based, B. Electrophoresis, C. Flow cytometry, D. G-banding
C: Flow cytometry
Answer: C: Flow cytometry 
Explanation: None