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': 'Among various glands, salivary gland secretion is unique in that, its secretions are controlled by \nSelect and explain. \nA. Hormones, B. Nerves, C. Chemicals, D. All of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]