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