This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
Which is the best investigation for carcinoma head of pancreas: 
Select and explain. 
A. Guided biopsy, B. ERCP, C. Transduodenal/transperitoneal sampling, D. EUS
A: Guided biopsy
Answer: A: Guided biopsy 
Explanation: Percutaneous liver biopsy under USG or CT guidance can be diagnostic, but there is a risk of hemorrhage as these tumors are highly vascular REF : BAILEY AND LOVE 27TH