<prompt> Subdural haematoma most commonly results from:Rupture of intracranial aneurysmRupture of cerebral AVMInjury to coical bridging veinsHemophilia  <response>: Answer is C Injury to coical bridging veins: Subdural hemorrhage is caused by the rupture of bridging veins that connect the brain and the dural sinuses i.e. coical bridging veins. Memo: Most common cause of extradural hemorrhage is Rupture of middle meningeal aery. 