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': 'All are true about polio vaccines except \nSelect and explain. \nA. OPV is live attenuated vaccine, B. IPV Provides Intestinal immunity, C. IPV is killed formalised vaccine, D. OPV is effective than IPV during Epidemics', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]