Most common cause of non traumatic subarachnoid hemorrhage -: (A) Idiopathic, (B) Berry aneurysm rupture, (C) Hypertension, (D) AV malformation
Answer is B. Ans. is 'b' i.e., Berry aneurysm o Excluding head trauma, most common cause of subarachnoid hemorrhage is rupture of a saccular (Berry) aneurysm.