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
Integrated Surveillance Disease Programme recommends which among the following for non-communicable diseases? 
Select and explain. 
A. Sentinel surveillance, B. Periodic surveys, C. Regular surveillance, D. All the above
C: Regular surveillance
Answer: C: Regular surveillance 
Explanation: Regular surveillance