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: Gynaecology & Obstetrics
Commonest cause of recto vaginal fistula is : 
Select and explain. 
A. Following Weheim's operation, B. Pressure necrosis during labour, C. Improper repair of perineal tear, D. Abnormal presentation
C: Improper repair of perineal tear
Answer: C: Improper repair of perineal tear 
Explanation: Improper repair of perineal tear