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
[{'content': 'Infertility in women with endometriosis is most likely due to \nSelect and explain. \nA. Tubal obstruction, B. Ovulatory dysfunction, C. Defect in implantation, D. Anti - sperm antibodies', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Adhesions causing tubal obstruction and thereby impairing oocyte - pickup is responsible to cause infertility in women with endometriosis.', 'role': 'assistant'}]