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': 'In Mallory Weiss syndrome the rupture commonly occurs at - \nSelect and explain. \nA. Gastric cardia, B. Oesophagus mucosa, C. Gastro oesophageal junction, D. Gastroduodenal junction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In Mallory-Weiss syndrome the majority (75-90%) of tear is located below the gastroesophageal junction, entirely within the gastric cardia.\nOnly a few of the tears involve the gastro-esophageal junction.', 'role': 'assistant'}]