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: ENT
[{'content': 'Dysphagia lusoria is because of - \nSelect and explain. \nA. Esophageal webs, B. Achalasia, C. Esophageal stricture, D. Aberrant great vessels', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dysphagia\xa0lusoria\n\nDysphagia Lusoria is a disorder of swallowing caused due to vascular anomalies\nCauses of Dysphagia Lusoria\nA right aortic arch\nA double aortic arch\nA vascular constricting ring formed by FDA or a ligamentum arteriosum and the pulmonary artery or aortic arch.\nAn abnormal right subclavian artery(arteria lusoria)\nAn abnormal innominate artery\nDiagnosis is made by a lipoidal swallow or by arteriography.', 'role': 'assistant'}]