This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
IOC for urethral trauma: 
Select and explain. 
A. Ascending urethrogram, B. Descending urethrogram, C. USG, D. CT scan
A: Ascending urethrogram
Answer: A: Ascending urethrogram 
Explanation: Ans. (a) Ascending urethrogramRef: Bailey and Love 27th Edition, Page 1479* Most common urethral injury sites caused by external trauma are bulbar and membranous urethra.* Most common cause of urethral trauma: Catheterization and cystoscope induced.* IOC for urethral injuries is by ascending urethrogram using water soluble contrast.