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: Pathology
Port wine stains are seen in: 
Select and explain. 
A. Nevus, B. Haemangionna, C. Melanoma, D. All the above
B: Haemangionna
Answer: B: Haemangionna 
Explanation: None