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: Radiology
Trifoliate appearance is in – 
Select and explain. 
A. Peptic ulcer, B. Pyloric stenosis, C. Carcinoma head of pancreas, D. None
A: Peptic ulcer
Answer: A: Peptic ulcer 
Explanation: The appearance of 'trifoliate duodenum' is due to secondary duodenal diverticula which occurs as a result of scarring of peptic ulcer.