This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
Cell fusion is an innovative technique of preparing specific antibodies. Techniques to induce the cell-fusion include the following except 
Select and explain. 
A. By adhering some inactivated viruses to surface membrane, B. By adding component polyethylene glycol, C. By mild electric shock, D. By reducing the viscosity of the membrane
D: By reducing the viscosity of the membrane
Answer: D: By reducing the viscosity of the membrane 
Explanation: Cell fusion is an innovative technique of preparing specific antibodies by the hybridoma technology introduced by Kohler and Milstein.Techniques to induce the cell-fusion include:By adhering some inactivated viruses to surface membraneBy adding component polyethylene glycolBy mild electric shock