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': 'Parotid gland contains \nSelect and explain. \nA. Serous acini, B. Mucinous acini, C. Serous and mucinous acini with equal proportion, D. 75 % serous acini and 25 % mucinous acini', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Parotid glands - Contain serous acini\nSub lingual glands - Contain mucious acini\nMinor salivary glands - Contain mucious acini\nSubmandibular glands - Contain both serous and mucinous acini', 'role': 'assistant'}]