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: Social & Preventive Medicine
[{'content': 'Which of the following is false regarding Oral Polio Vaccine (OPV)? \nSelect and explain. \nA. Residual neuro-paralysis is a complication, B. It is a killed vaccine, C. Requires sub- zero temperature for storage long term, D. Induces intestinal and humoral immunity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]