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: Dental
[{'content': 'Piebaldism refers to – \nSelect and explain. \nA. Androgenetic alopecia, B. Erythema nodosum leprosum, C. Associated with white forelock, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Piebaldism is a hypopigmented disorder which is present since birth and is characterized by congenital white forelock and hypopigmented or depigmented macules on the central part of the forehead, ventral trunk, and upper & lower extremities. Involvement is bilaterally symmetrical.', 'role': 'assistant'}]