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': 'Percentage of tubal causes in female infertility is \nSelect and explain. \nA. 7%, B. 19%, C. 26%, D. 40%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Tubal factor infertility is most commonly caused by pelvic inflammatory diseases, sexually transmitted diseases or other diseases such as endometriosis.\nThe American Society for Reproductive Medicine (ASRM) says that 25 to 35 percent of female infertility is due to tubal factors.', 'role': 'assistant'}]