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': 'The following is an impoant indicator to measure the incidence of malaria in a community \nSelect and explain. \nA. Slide positivity rate, B. Annual falciparum incidence, C. Annual parasite incidence, D. Infant parasite rate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Annual Parasite Incidence (API) Sophisticated measure of malaria incidence in a community API = Confirmed cases during one year/population under surveillancex1000 Ref: Park 25th edition Pgno : 286', 'role': 'assistant'}]