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
Queckenstedt test is done for 
Select and explain. 
A. Glomus tumor, B. CSF rhinorrhea, C. Otosclerosis, D. Acoustic neuroma
B: CSF rhinorrhea
Answer: B: CSF rhinorrhea 
Explanation: Drainage of CSF in some cases may often be elicited on endoscopy by having the patient perform a Valsalva maneuver or by compressing both jugular veins (Queckenstedt-Stookeytest) Ref : internet sources