This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
[{'content': 'Blood supply of thoracic pa of esophagus \nSelect and explain. \nA. Aoa, B. Inferior thyroid aery, C. Gastric aery, D. Superior thyroid aery', 'role': 'user'}, {'content': "Answer: A \nExplanation: OESOPHAGUS-AERIAL SUPPLY 1.The cervical pa including the segment upto the arch of aoa is supplied by the inferior thyroid aeries. 2.The thoracic pa is supplied by the oesophageal branches of the aoa. 3.The abdominal pa is supplied by the oesophageal branches of the left gastric aery. REF:B D Chaurasia's human anatomy,Vol.1.Fifth edition.Pg 270", 'role': 'assistant'}]