This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Medicine
[{'content': 'Which of the following is associated with atherosclerosis ? \nSelect and explain. \nA. Chlamydia trachomatis, B. Chlamydia pneumonae, C. Chlamydia psittaci, D. Chlamydia gingivalis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Chlamydia pneumonae o Epidemiologic studies have demonstrated an association between serologic evidence of C. pneumoniae infection and atherosclerotic disease of the coronary and other arteries.", 'role': 'assistant'}]