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
Most common cause of bleeding for massive hemothorax in blunt trauma to chest is from 
Select and explain. 
A. Intercostal vessels, B. Bronchial vessels, C. Pulmonary vessels, D. Internal mammary aery
A: Intercostal vessels
Answer: A: Intercostal vessels 
Explanation: Answer- A. Intercostal vesselsThe most common cause of massive haemothorax in blunt injury to chest is continuing bleeding from torn intercostal vexels or occasionallyfrom the internal mammary aety.