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: Anatomy
[{'content': 'Parotid glands are supplied by branches from? \nSelect and explain. \nA. Internal carotid aery, B. External carotid aery, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The aerial supply to the parotid gland is from the external carotid aery and its branches within and near the gland. The veins drain to the external jugular vein local tributaries.', 'role': 'assistant'}]