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': 'A 14 year old boy came to opd with hypopigmented skin patches over forehead and white forelock. The most likely diagnosis is: \nSelect and explain. \nA. Albinism, B. Nevus anemicus, C. Nevus achromicus, D. Piebaldism', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Piebaldism is defect in the migration of melanocytes form neural crest. It presents with localized white patches and areas of normal skin can also be seen within the white patches. White Forelock can also be seen.', 'role': 'assistant'}]