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
What is /are components of Nutrition surveillance? 
Select and explain. 
A. Policy maker, B. DOTS, C. Nutritional survey, D. AFP surveillance
D: AFP surveillance
Answer: D: AFP surveillance 
Explanation: Nutrition surveillance: – Main strategy: Detection of malnutrition (nutritional survey)
– Approach: Diagnostic-interventional
– Sample: Representative, 50 - 100 size group
– Objectives: 1. To aid health and development 2. To provide input for program management and evaluation (to policy makers) 3. To give timely warning and intervention (to prevent short-term food crises)