This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Physiology
[{'content': 'Most common site a spontaneous rupture of esophagus is \nSelect and explain. \nA. Cricopharyngeal junction, B. Cardioesophageal junction, C. Mid esophagus, D. After the crossing of arch of aoa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: MC site: left posterolateral side of the distal esophagus', 'role': 'assistant'}]