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: Medicine
Which is not true about erosive gastritis -a) Endoscopy is investigation of choiceb) Pain is absentc) It may be drug inducedd) Barium meal may clinch the diagnosis 
Select and explain. 
A. ac, B. ad, C. ab, D. bd
D: bd
Answer: D: bd 
Explanation: None