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: Pharmacology
For hiatus hernia, investigation of choice is not related-surgery 
Select and explain. 
A. Barium meal follow through, B. Barium meal upper GI, C. Barium meal upper GI in Trendelenburg position, D. Barium meal double contrast
C: Barium meal upper GI in Trendelenburg position
Answer: C: Barium meal upper GI in Trendelenburg position 
Explanation: .