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': 'Gands of Blandin and Nuhn are \nSelect and explain. \nA. Mucous, B. Serous, C. Mixed, D. Any of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]