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': 'Maternal antibodies do not occur for \nSelect and explain. \nA. Polio, B. Whooping cough, C. Diphtheria, D. Tetanus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Infants are susceptible to Pertussis infection from birth because maternal antibody does not appear to give them protection.', 'role': 'assistant'}]