This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infertility, Subject name: Gynaecology & Obstetrics
[{'content': 'Tubal factor as a cause of infeility is seen in ----- \nSelect and explain. \nA. 7%, B. 19%, C. 26%, D. 40%', 'role': 'user'}, {'content': "Answer: C \nExplanation: Causes of female infeility: Ovarian causes-30-40% Tubal blockade-25-30% unexplained infeility-15% uterine factors-10% PCOS-10% cervical factor-5% pelvic cause-5% shaw's Textbook of Gynaecology 16th edition Page no 249", 'role': 'assistant'}]