This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prostate Cancer, Subject name: Surgery
A 72 yrs. old man, Dayaram is found on examination to have a prostatic nodule. Best investigation to evaluate him : 
Select and explain. 
A. CT scan pelvis, B. IVP, C. Prostatic massage for examination of secretions, D. Transrectal U/S
D: Transrectal U/S
Answer: D: Transrectal U/S 
Explanation: Ans. is 'd' ie Transrectal U/S "TRUS (Transrectal U/S) remains the most accurate method of staging the local disease (prostatic cancer)/' - Bailey & Love