This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Esophageal Disorders - Clinical Presentation, Subject name: Surgery
[{'content': 'Dysphagia Lusoria is caused by - \nSelect and explain. \nA. Compression by aberrant blood vessels, B. Achalasia Cardia, C. Mallory Weiss Tear, D. CA Esophagus', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Compression by aberrant blood vessels o Dysphagia Lusoria is a disorder of swallowing caused due to vascular anomalies.o Causes of Dysphagia Lusoria.# A right aortic arch# A double aortic arch# A vascular constricting ring formed by a PDA or a ligamentum arteriosum and the pulmonary artery or aortic arch.# An abnormal right subclavian artery.(Arteria lusoria)# An abnormal innominate artery.o Diagnosis is made by a lipoidal swallow or by arteriography.", 'role': 'assistant'}]