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
28 yr with infeility lapro tube uterus healthy ovary diagnosis - 
Select and explain. 
A. PCOS, B. Ovarian cyst, C. Fibroid, D. Endometriosis
D: Endometriosis
Answer: D: Endometriosis 
Explanation: Ans.D. EndometriosisIn endometriosis, cause of infeility isImmobility of tubesAnovulationTubal blockMale factor: 30%Tubal, uterine & peritoneal factor: 25%Ovarian factor: 25%Cervical factor: 10%Unexplained factor: 10%