This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal Radiology, Subject name: Radiology
Apple core lesion is seen in 
Select and explain. 
A. Diveiculosis, B. Diveiculitis, C. Ca- colon, D. Intussusception
C: Ca- colon
Answer: C: Ca- colon 
Explanation: The Radiological hallmarks of the classic colonic Apple core lesion are sho, sharply defined regions of annular colonic narrowing with overhanging margins; ulcerated mucosa; and eccentric, irregular lumen. An apple core lesion can have a number of causes, the most serious being malignant neoplasm.