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': 'Plague is transmitted by - \nSelect and explain. \nA. Mite, B. Flea, C. Sand fly, D. None', 'role': 'user'}, {'content': "Answer: B \nExplanation: - plaque is primarily a zoonoses caused by Yersenia pestis. -The commonest and the most efficient vector of the plaque is rat flea, Xenopsylla cheopis. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:293 <\\p>", 'role': 'assistant'}]