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': 'In a patch of vitiligo - \nSelect and explain. \nA. Melanin synthesis is inhibited, B. Melanosomes are absent, C. Melanocytes are absent, D. Melanocytes are reduced', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C. i.e. Melanocytes are absent', 'role': 'assistant'}]