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: Surgery
[{'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: Dysphagia lusoria is a disorder of swallowing caused due to vascular anomalies and includes: A right aoic arch A double aoic arch A vascular constricting ring formed by a PDA or a ligamentum aeriosum and pulmonary aery or aoic arch An abnormal right subclan aery An abnormal innominate aery Diagnosis is made by lipoidal swallow or aeriography. Ref: Bailey and Love 24/e, Page 995', 'role': 'assistant'}]