This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: ENT
[{'content': 'Dysphagia lusoria is due to \nSelect and explain. \nA. Esophageal diveiculum, B. Aneurysm of aoa, C. Esophageal web, D. Compression by aberrant blood vessel', 'role': 'user'}, {'content': 'Answer: D \nExplanation: The MC anomaly is right subclan aery arising from the descending aoa and travels behind the esophagus to complete its course to the right upper extremity, may cause significant posterior compression of the esophagus Ref : ENT textbook by Dhingra 6th edition Pgno : 447', 'role': 'assistant'}]