This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Which of the following ricketsial diseases is transmitted by tick - \nSelect and explain. \nA. Murine typhus, B. Rocky mountain spotted fever, C. Q-fever, D. Endemic typhus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Rickettsial disease Insect vector Murine typhus (endemic typhus) - Flea Q fever Nil Ref: PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition pg 299', 'role': 'assistant'}]