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: Dental
Salmon patch resolves after 
Select and explain. 
A. 1 year, B. 3 years, C. 5 years, D. Doesn't resolve at all
A: 1 year
Answer: A: 1 year 
Explanation: Salmon patch usually resolves after 1 year.