Commonest cause of subarachnoid haemorrhage is:
Answer is A (Rupture of circle of Willis aneurysm): Most common cause of subarachnoid haemorrhage is ruptured saccular aneurysms. Most common site of saccular aneurysms is the anterior circulation on the circle of Willis
Rupture of circle of Willis aneurysm
Rupture or veebral aery aneurysm
Rupture of venecomitants of corpus striatum
Rupture of dural sinusis