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
Pain in Endometriosis is due to all except 
Select and explain. 
A. Inflammatory cytokines, B. Focal bleeding from endometriotic implants, C. Infiltration of nerves in pelvic floor, D. Retroversion of uterus
D: Retroversion of uterus
Answer: D: Retroversion of uterus 
Explanation: All except retroverted uterus are most common causes of dysmenorrhea in endometriosis.