This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Investigation of choice for oesophagal rupture is 
Select and explain. 
A. CT chest, B. Rigid esophagoscopy, C. Barium contrast swallow, D. Plain Xray
A: CT chest
Answer: A: CT chest 
Explanation: CT Chest more accurate, Chest X-ray shows pneumomediastinum. Reference: SRB's Manual of Surgery, 6th Edition, page no= 802, 793.