This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
Type of surveillance included in integrated disease control program for non-communicable disease is? 
Select and explain. 
A. Sentinel surveillance, B. Regular surveillance, C. Periodic regular survey, D. Additional state priority
A: Sentinel surveillance
Answer: A: Sentinel surveillance 
Explanation: Park's textbook of preventive and social medicine 23rd edition. sentinel surveillance - a method for identifying the missing cases and there by supplementing the notified cases is required..