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': 'Eleven month old child presents with erythematous lesion with central clearing which has been decreasing in size - \nSelect and explain. \nA. Strawberry angioma, B. Nevus, C. Portwine stain, D. Cavernous haemangioma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]