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': "Peg cells' are seen in: \nSelect and explain. \nA. Vagina, B. Vulva, C. Ovary, D. Tubes", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Important Facts about Fallopian Tube:\nLength = 4 inches or 10-12 cm.\nParts are :\n\nInterstitium (Intramural): 1.8 cm long and 1 mm diameter (narrowest part). It has no longitudinal muscles, only circular muscles are present.\nIsthmus: 3.5 cm long and 2 mm in diameter.\xa0(Second narrowest part).\nAmpulla: widest\xa0and longest part\xa06-7.5 cm and fertilization occurs here\nFimbria/infundibulum\n\nHistologically:\n\nFallopian tubes have a unique type of cells called as Peg cells\xa0whose function is not known.', 'role': 'assistant'}]