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: Anatomy
[{'content': "True about ureter's entry into bladder-a) At medial angle of trigoneb) At lateral angle of trigonec) Make an angled) Is straighte) Valveless \nSelect and explain. \nA. bce, B. bc, C. acd, D. ace", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ureter opens into the lateral angle of trigone of the bladder.\nIt passes obliquely (at an angle) through the bladder wall. This intravesical oblique course has a valvular action (but there is no true valve).', 'role': 'assistant'}]