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 these does not change or remains same throughout life 
Select and explain. 
A. Salmon patch, B. Strawberry angiomas, C. Portwine stain, D. Capillary hemangiomas
C: Portwine stain
Answer: C: Portwine stain 
Explanation: None