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': 'What is the blood supply of the cervical esophagus- \nSelect and explain. \nA. Inferior thyroid artery, B. Superior thyroid artery, C. Bronchial artery, D. External carotid artery', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Arterial supply of esophagus\n\xa0Cervical part - Inferior thyroid artery\nThoracic part - esophageal branches of descending thoracic aorta, bronchial arteries.\nAbdominal part - left inferior phrenic artery, left gastric artery.', 'role': 'assistant'}]