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: Medicine
[{'content': 'Which is the BEST method to diagnose a case of Mallory weiss tear? \nSelect and explain. \nA. Esophagogastroduodenoscopy, B. Side view endoscopy, C. MRI scan, D. Angiogram', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Mallory-Weiss Tear A Mallory-Weiss tear is a linear mucosal rent near or across the gastroesophageal junction. It may disrupts the submucosal aeriole resulting in brisk hemorrhage. MUST KNOW: Endoscopy is the best method of diagnosis. Actively bleeding tear can be treated endoscopically with epinephrine injection, coaptive coagulation, band ligation, or hemoclips. Ref: Harrison, Edition-18, Page-2416.', 'role': 'assistant'}]