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 of the following agents have polysaccharide capsule related antigen antibody responses except - \nSelect and explain. \nA. Pneumococcus, B. Meningococcus, C. Haemophilus influenzae, D. Bordetella pertussis', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]