This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Subdural Hematoma (SDH) is caused by 
Select and explain. 
A. Bridging veins, B. Caroticocavemous fistula rupture, C. Middle meningeal artery, D. None
A: Bridging veins
Answer: A: Bridging veins 
Explanation: (A) Bridging veins # SUBDURAL BLEEDING arises from rupture of cortical vessels/bridging veins.> Relatively severe trauma> No lucid interval> Diffuse concave lesion on computed tomography> Require immediate transfer to a neurosurgical unit for decision on evacuation 50 per cent mortality.