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
A/E used to detect Ca. prostate gland :a) PSAb) MRIc) CT Scand) DSAe) TRUS 
Select and explain. 
A. abc, B. acd, C. bcd, D. bd
C: bcd
Answer: C: bcd 
Explanation: Investigation used to detect Ca Prostate are PSA & TRUS (including TRUS guided biopsy)
Cross-sectional imaging by CT/MRI of the pelvis are used for staging purpose (excluding lymph node metastasis)
X-rays bone scans are used to detect lung & bone metastases.