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: Surgery
[{'content': "Smegma is secreted by - \nSelect and explain. \nA. Tyson gland, B. Brenner gland, C. Cowper's gland, D. Bartholin' s gland", 'role': 'user'}, {'content': 'Answer: A \nExplanation: • Tyson’s Glands ultimately produce an oily substance, which, when mixed with shed skin cells, constitute smegma.', 'role': 'assistant'}]