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: Dental
Ongoing systematic collection, analysis and interpretation of data and use of this information to take action for prevention and control of disease is known as: 
Select and explain. 
A. Surveillance, B. Program, C. Health Planning, D. Management
A: Surveillance
Answer: A: Surveillance 
Explanation: The question is self-explanatory.