This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Picket-fence graph of temperature is seen in: 
Select and explain. 
A. Otitic hydrocephalous, B. Lateral sinus thrombosis, C. Extradural abscess, D. Meningitis
B: Lateral sinus thrombosis
Answer: B: Lateral sinus thrombosis 
Explanation: Diurnal spikes of fever of 104deg or 105deg F are typical of lateral sinus thrombosis. Due to use of antibiotics, this picture is not seen in all patients of sinus thrombosis these days. There is fever in meningitis and extradural abscess but it does not show diurnal spikes.