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 one of the following is primary prevention: 
Select and explain. 
A. Active treatment, B. Suppo, C. Both of the above, D. None of the above
B: Suppo
Answer: B: Suppo 
Explanation: Suppo