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': 'Burden of malaria is best estimated by ? \nSelect and explain. \nA. Mosquito rate, B. API, C. Parasite rate, D. SPR', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., API o API is a sophasticated measure of malaria incidence in a community. o Areas with API 2/1000 population per year have been classified as high risk area in India and thereby eligible for vector control.", 'role': 'assistant'}]