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
The diagnosis in a patient with 6th nerve palsy, retro orbital pain and persistent ear discharge is - 
Select and explain. 
A. Gradenigo's syndrome, B. Sjogrens syndrome, C. Frey's syndrome, D. Rendu osler weber disease
A: Gradenigo's syndrome
Answer: A: Gradenigo's syndrome 
Explanation: None