This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Trauma, Subject name: Surgery
[{'content': 'A pt. died after a blunt trauma to chest Most common cause of death in blunt trauma to chest is - \nSelect and explain. \nA. Pneumothorax, B. Tracheo bronchial rupture, C. Pulmonary laceration, D. Oesophageal rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Option B is more common cause of death in blunt trauma of chest when compared to the other complications seen in chest trauma', 'role': 'assistant'}]