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': 'Sitaram a 40-years old man ,met with an accident and comes to emergency department with engorged neck veins, pallor, rapid pulse and chest pain diagnosis is \nSelect and explain. \nA. Pulmonary laceration, B. Cardiac tamponade, C. Hemothorax, D. Splenic rupture', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]