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': 'Ricketsial pox is transmitted by: \nSelect and explain. \nA. Louse, B. Soft tick, C. Hard tick, D. Mite', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mite', 'role': 'assistant'}]