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': 'Trench fever is caused by which of the following organisms? \nSelect and explain. \nA. Rickettssia prowazeki, B. Borrelia recurrentis, C. Rickettssia quintana, D. Tunga penetrans', 'role': 'user'}, {'content': "Answer: C \nExplanation: Frequently asked Rickettssia quintana - Trench fever Rickettssia prowazeki - Epidemic typhus Borrelia recurrentis - Relapsing fever Ref: Park's textbook of Preventive and Social Medicine, 21stedition, page-718", 'role': 'assistant'}]