This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin Lesions And Disorders Of Pigmentation, Subject name: Skin
[{'content': 'A child presents with white lesion (depigmented macule ) of 2x 2 cm with irregular margin over forehead and glabella. There is white forelock over forehead since birth. Diagnosis is: \nSelect and explain. \nA. Piebaldism, B. Dermatitis, C. Vitiligo, D. Nevus of Ito', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. PiebaldismWhite forelocks are also seen associated with warden burg syndrome', 'role': 'assistant'}]