This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thoracic Injury, 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: Ans. is 'a' ie Abdominal solid viscera injury Most common cause of hypotension in trauma pt. is due to haemorrhage. The blood loss may be external and obvious, or internal and covert or combination of both. The fracture of the lower ribs (T9 - T12) are usually associated with splenic or hepatic injuries and the fracture of upper ribs (T1-T3), clavicle or scapula are associated with major vascular injuries.