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
Investigation to diagnose carcinoma head of pancrease are/is -a) Hypotonic duodenogramb) X-ray abdomenc) USGd) Endoscopye) C.T. Scan 
Select and explain. 
A. bce, B. acde, C. abcd, D. abde
B: acde
Answer: B: acde 
Explanation: Investigations done in pancreatic cancer


​USG
CT scan
ERCP
Endoscopic U/S
Angiography
Barium studies - barium meal & hypotonic duodenography
Contrast enhanced CT scan is the inv. of choice.