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': "Disease of sweat gland ? \nSelect and explain. \nA. Fordyce's spot, B. Acne vulgaris, C. Fox-Fordyce's disease, D. None", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Fox-Fordyce's disease", 'role': 'assistant'}]