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: Microbiology
[{'content': 'All are true about bordetella pertussis except \nSelect and explain. \nA. a)Most common cause is B. petrussis, B. It may occur in children and young adult after vaccination, C. Bacteria culture from nasopharyngeal swab is the definitive diagnosis, D. Presence of antibodies in serum is diagnostic of the disease', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]