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': "Fordyce's spot involves – \nSelect and explain. \nA. Sebaceous glands, B. Pilosebaceous glands, C. Hair, D. Nails", 'role': 'user'}, {'content': "Answer: A \nExplanation: Diseases of sebaceous glands\n\nPilosebaceous glands\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0\xa0→\xa0\xa0\xa0\xa0\xa0\xa0 Acne vulgaris, Epidermoid (sebaceous) cyst.\nEctopic sebaceous glands \xa0 \xa0→\xa0\xa0 Fordyce's spot, Montgomery's tubercle", 'role': 'assistant'}]