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': 'Spontaneous regression is seen in - \nSelect and explain. \nA. Portwine haemangioma, B. Strawberry haemangioma, C. Cavernous haemangioma, D. Arterial angioma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sponteaneous regression is a feature of two varieties of capillary hemangiomas :\n\nSalmon patch : regresses by 1 year of age\nStrawberry angioma: regresses by the age of 7-8 years.', 'role': 'assistant'}]