This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: ENT
Griesinger's sign is seen in - 
Select and explain. 
A. Lateral sinus thrombosis, B. Meningitis, C. Brain abscess, D. Cerebellar abscess
A: Lateral sinus thrombosis
Answer: A: Lateral sinus thrombosis 
Explanation: Lateral Sinus Thrombophlepitis

It is inflammation of the walls of sigmoid sinus (lateral sinus) with the formation of thrombus - Complication of acute coalescent mastoiditis or masked mastoiditis
Aetiology - Chronic SOM with cholesteatoma