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': 'Kala-agar is transmitted by - \nSelect and explain. \nA. Reduvid bug, B. Sandfly, C. Tsetse fly, D. Mosquito', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Sandfly Diseases transmitted by sandflv Kala-azar Sand-fly fever o Oriental sore o Oraya fever", 'role': 'assistant'}]