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
Radiological feature of ischemic colitis is 
Select and explain. 
A. Saw toothing, B. Craggy popcorn appearance, C. Thumb printing, D. Cobble stone appearance
C: Thumb printing
Answer: C: Thumb printing 
Explanation: C i.e. Thumb printing