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: Pathology
[{'content': "Ectopic sebaceous glands in the mouth are called: \nSelect and explain. \nA. Linea alba buccalis, B. Heck's disease, C. Lingual varices, D. Fordyce spots.", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]