This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Elimination, Eradication, Surveillance, Subject name: Social & Preventive Medicine
[{'content': 'Definition of surveillance:- \nSelect and explain. \nA. Analysis of routine measurements, B. Intermittent scrutiny of factors, C. Systemic collection and analysis of data, D. All of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: surveillance Monitoring Constant scrutiny of factors affecting a disease with attention, authority & suspicion (Systematic ongoing collection, compilation, analysis & interpretation of data) Inbuilt action component is seen Feedback is inbuilt Cyclical continuous process Broader concept Continuous overlooking of progress of health activity [performance & analysis of routine measurements aimed at detecting changes in environment or health status of population - e.g. monitoring of air pollution, water quality, and growth & nutritional status No inbuilt action component No feedback One-time linear process Smaller concept', 'role': 'assistant'}]