This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition and health, Subject name: Social & Preventive Medicine
[{'content': 'Medium term intervention for Vitamin A prphylaxis is - \nSelect and explain. \nA. Measles immunization, B. Vit A supplementation, C. Foification of food, D. Green leafy vegetables', 'role': 'user'}, {'content': "Answer: C \nExplanation: - medium term intervention for vitamin A prophylaxis is foification of ceain foods with vitamin A. - addition of vitamin A to dalda in India is a typical example. Reference : Park's textbook of preventive and social medicine, 23rd edition, pg no:641 <\\p>", 'role': 'assistant'}]