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