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: Forensic Medicine
Following delivery, urinary bladder becomes a pelvic organ after: UPSC 07; MAHE 11 
Select and explain. 
A. 4 years, B. 6 years, C. 10 years, D. pubey
D: pubey
Answer: D: pubey 
Explanation: Ans. is 'd' i.e., PubeyIn infant and children the urinary bladder, even when empty, is in the abdomen.It begins to enter the greater pelvis at about 6 years of age, but it does not enter the lesser pelvis and become a pelvic organ until after pubey.