This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Concept of health and disease, Subject name: Social & Preventive Medicine
[{'content': 'The most impoant function of sentinel surveillance is \nSelect and explain. \nA. To find the total amount of disease in a population, B. To find the incidence of the disease, C. To determine the trend of disease in a population, D. A more costly phenomenon', 'role': 'user'}, {'content': "Answer: A \nExplanation: Sentinal surveillance It estimates disease prevalence in a population. It's a method for identifying the missing cases and thereby supplementing the notified cases. It provides more detailed information than that which could be obtained from the traditional notification system. Ref: Park's Textbook of Preventive and Social Medicine; 24th edition - Page no. 45", 'role': 'assistant'}]