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': 'The length of the fallopian tube is: \nSelect and explain. \nA. 8 - 10 cm, B. 10 - 12 cm, C. 15 - 18 cm, D. 18 - 20 cm', 'role': 'user'}, {'content': 'Answer: B \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 partQ). It has no longitudinal muscles, only circular muscles are present.Q\nIsthmus: 3.5 cm long and 2 mm in diameter.Q (Second narrowest partQ).\nAmpulla: widestQ and longest partQ 6-7.5 cm and fertilization occurs hereQ\nFimbria/infundibulumQ\n\nHistologically:\n\nFallopian tubes have unique type of cells called as Peg cellsQ whose function is not known.Q', 'role': 'assistant'}]