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': 'Which of the following is M.C. cause of hypotension in fracture ribs (T10-T12) - \nSelect and explain. \nA. Abdominal solid visceral organ injury, B. Injury to aorta, C. Inter costal artery damage, D. Pulmonary contusion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: • MC cause of hypotension in trauma patients: Hemorrhage\n• MC cause of shock after trauma is hypovolemia, and there are five places that a patient can lose large volume of blood:\nExternally, the chest, the abdomen, the retroperitoneum, and into muscle compartments (Blood on the floor and four more).\n• Fracture of lower ribs (T9-T12) are usually associated with splenic or hepatic injuries\n• Fracture of upper ribs (T1-T3), clavicle or scapula is usually associated with major vascular injuries', 'role': 'assistant'}]