A 25-year-old male had severe headache followed by unconsciousness. CSF tap revealed red blood cells. Most likely diagnosis is:: (A) Subdural hematoma, (B) Embolism, (C) Tumour, (D) Ruptured aneurysm
Answer is D. Answer is D (Ruptured aneurysm): Severe headache, brief period of unconsciousness and blood in C.S.F. is a classical feature of subarachnoid hemorrhage.