This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Oesophagus, Subject name: ENT
[{'content': 'Dysphagia lusoria is caused by? \nSelect and explain. \nA. Abdominal aorta, B. Thoracic aorta, C. Aberrant right subclavian artery, D. None of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. (c) Aberrant right subclavian arteryRef: Srb's Manual of Surgery by SriramBhat p 720", 'role': 'assistant'}]