This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rickettsial Diseases, Subject name: Social & Preventive Medicine
[{'content': 'Scrub typhus is caused by - \nSelect and explain. \nA. R typhi, B. R Akari, C. R prowazekii, D. R tsutsugamushi', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., R tsutsugamushi o Has been explained in previous years", 'role': 'assistant'}]