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: Pathology
[{'content': 'The infective agent causing atherosclerosis - \nSelect and explain. \nA. M. pneumoniae, B. C. Pneumoniae, C. H influenza, D. C. Diptheriae', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Seroepidemiological studies suggest an association between several microbes and coronary heart disease.\nMicrobes or their structural components are found in atherosclerotic plaques, but the only intact microbes commonly present are herpes viruses and Chlamydia pneumoniae.\nThese agents are able to initiate and accelerate atherosclerosis in animal models.\nIf they cause persistent infection in the vessel wall, they can directly promote a proinflammatory, procoagulant, and proatherogenic environment.', 'role': 'assistant'}]