Most common cause of cerebrovascular accident is :
Answer is A (Embolism): The most common cause of cerebrovascular accidents is embolism. Harrisons 16th has not classified ischaemic strokes into thrombotic and embolic events but into Atherosclerosis (4%), cardioembolic (17%), & others (64%). Neveheless even others (64%) include most commonly embolic events other than those of cardiac origin such as 'aery to aery embolic strokes' etc. and hence the answer stays the same.
Embolism
Aerial thrombosis
Venous thrombosis
Haemorrhage