This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
A 26-year-old male presents with acute right lower quadrant pain in abdomen. Suspecting appendicitis, a USG is done but it is equivocal. Next investigation would be: 
Select and explain. 
A. CT scan, B. Plain X-ray, C. Serum ESR, D. MRI abdomen
A: CT scan
Answer: A: CT scan 
Explanation: Ans. (a) CT scanRef: Bailey and Love 26th edition, Page 1206* Most commonly done investigation is USG abdomen* Most accurate investigation -- CECT scan