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: Skin
[{'content': "Becker's nevus is - \nSelect and explain. \nA. Epidermal nevus, B. Melanocytic nevus, C. Vascular nevus, D. None", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is'a' i.e., Epidermal nevus", 'role': 'assistant'}]