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
[{'content': 'Methods of producing fusion of cells are A/E \nSelect and explain. \nA. Attaching inactive viral paicles on cell membrane, B. Adding polyethylene glycol, C. Applying a small electric current, D. Reducing surface tension', 'role': 'user'}, {'content': 'Answer: D \nExplanation: D i.e. Reducing surface tension Cell fusion (eg. as used in hybridoma technique to produce monoclonal antibodies) can be brought about by - Exposure to polyethylene glycol gelQ - Electric field induced (i.e. applying small electric current) cell fusionQ - Laser induced cell fusion - Attaching inactive viral paiclesQ like inactivated rota virus and Sendai virus.', 'role': 'assistant'}]