This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urinary Fistulas, Subject name: Gynaecology & Obstetrics
[{'content': 'Ureter is identified at operation by: \nSelect and explain. \nA. Rich arterial plexus, B. Peristaltic movement, C. Relation to lumber plexus, D. Accompanied by renal vein', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is b, i.e. Peristaltic movementRef: Stud progress in Obs and Gynae Vol 16, p306At operation ureter is recognized by:* Its pale glistening appearance* By a fine longitudinal plexus of vessels on its surface* More particularly by its peristaltic movement* By palpation between finger and thumb as a firm cord which, when escapes, gives a characteristic 'snap'.Absence of pulsation does not serve to identify a structure as ureter because veins and obliterated umbilical artery are also non pulsatile.", 'role': 'assistant'}]