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 a patient with multisystem trauma, thepresence of hypotension along with elevated central venouspressure is suggestive of - \nSelect and explain. \nA. Upper airway obstruction, B. Major abdominal bleed, C. Cardio-pulmonary problem, D. Spinal cord injury', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]