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
[{'content': 'Which of the following is a mode of primary prevention? \nSelect and explain. \nA. Administration of vit A in children, B. Treating a sputum + ive case of TB, C. Splinting a fractured leg, D. Providing wheel chair for the limbless', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Here the vitamin A administration removes the risk factor. Hence it is a primary prevension strategy.', 'role': 'assistant'}]