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
Lynch howarth procedure is not used for 
Select and explain. 
A. To drain frontal mucocele, B. To remove frontal osteoma, C. To repair CSF leak, D. To treat epistaxis
C: To repair CSF leak
Answer: C: To repair CSF leak 
Explanation: None