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': 'Eschar is seen in all the Rickettsial diseases excent: \nSelect and explain. \nA. Scrub typhus, B. Rickettsial pox, C. Indian tick typhus, D. Endemic typhus', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is. 'd' i. e., Endemic typhus", 'role': 'assistant'}]