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: Surgery
Patient with pelvic fracture presents with anuria. After 24 hrs bladder is not palpable. Possible diagnosis includes:a) Bulbar urethral injuryb) Posterior urethral injuryc) Extraperitoneal rupture of bladderd) Intraperitoneal rupture of bladder 
Select and explain. 
A. ab, B. bc, C. bd, D. cd
D: cd
Answer: D: cd 
Explanation: The provided clues suggest rupture of the bladder, either intraperitoneal or extraperitoneal. The differentiation between the two could not be made on the basis of given clinical findings.