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': 'Of the total amount of saliva secreted by all the salivary glands, about 60% is secreted by the \nSelect and explain. \nA. Parotid glands, B. Sublingual glands, C. Submandibular glands, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]