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
True about ureter's entry into bladder-a) At medial angle of trigoneb) At lateral angle of trigonec) Make an angled) Is straighte) Valveless 
Select and explain. 
A. bce, B. bc, C. acd, D. ace
A: bce
Answer: A: bce 
Explanation: Ureter opens into the lateral angle of trigone of the bladder.
It passes obliquely (at an angle) through the bladder wall. This intravesical oblique course has a valvular action (but there is no true valve).