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 seen in 
Select and explain. 
A. CHPS, B. Achalasia, C. Peptic ulcer, D. Pneumoperitoneum
C: Peptic ulcer
Answer: C: Peptic ulcer 
Explanation: Trifoliate appearance is due to secondary duodenal diverticula which occurs as a result of scarring of peptic ulcer.