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
Which of the following is a mode of primary prevention? 
Select and explain. 
A. 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
A: Administration of vit A in children
Answer: A: Administration of vit A in children 
Explanation: Here the vitamin A administration removes the risk factor. Hence it is a primary prevension strategy.