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: Surgery
Which of the following conditions disappear spontaneously in first year of life? 
Select and explain. 
A. Port wine stain, B. Naevus flammeus, C. Salmon's patch, D. Strawberry hemangioma
C: Salmon's patch
Answer: C: Salmon's patch 
Explanation: None