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': 'Following is part of “Sentinel Surveillance” EXCEPT \nSelect and explain. \nA. Method for identifying the missing cases, B. Supplementing the notified cases, C. To estimate the fatality of the disease, D. To estimate the disease prevalence in total population', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]