This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Large intestine, Subject name: Surgery
Best investigation to diagnose colonic diveiculosis 
Select and explain. 
A. Barium enema, B. CT Scan, C. Ultrasound, D. MRI
A: Barium enema
Answer: A: Barium enema 
Explanation: Investigation of choice for colonic diveiculosis: Barium enema Investigation of choice for diveiculitis: CT scan