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': 'Which of the following is not transmitted by Arthropod- \nSelect and explain. \nA. Q fever, B. Rickettsial pox, C. Rocky mountain spotted fever, D. Relapsing feve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]