A patient presented with thunder clap headache. Followed by unconsciousness with progressive 3rd cranial nerve palsy: (A) Extradual hemorrhage, (B) Aneurysmal subarachnoid hemorrhage, (C) Basilar migraine, (D) Cluster Headache
Answer is B. Harrison's textbook of internal medicine 17th edition . *Sudden transient loss of consciousness may be preceded by brief moment of excruciating head ache ,but most patient first complain of head ache on regain the consciousness . *3rd cranial nerve palsy , associate with pupillary dilatation,loss of ipsilateral light reflex,focal pain above and behind the eye . Ref Harrison20th edition pg 2445