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
[{'content': 'Which of these does not change or remains same throughout life \nSelect and explain. \nA. Salmon patch, B. Strawberry angiomas, C. Portwine stain, D. Capillary hemangiomas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]