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': 'Narrowest pa of uterine tube is: March 2013 \nSelect and explain. \nA. Infundibulum, B. Ampulla, C. Isthmus, D. Interstitial', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. Interstitial Fallopian tube Lined by: Ciliated columnar epithelium Length: 10 cms', 'role': 'assistant'}]