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 of choice in appendicitis in adults 
Select and explain. 
A. CT Scan, B. USG, C. Serum ESR, D. MRI Abdomen
A: CT Scan
Answer: A: CT Scan 
Explanation: Answer- A. CT Scan