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: Surgery
Reverse 8 sign of frost berg seen in 
Select and explain. 
A. Duodenal atresia, B. Ampullary carcinoma, C. CA head pancreas, D. Jeyunal atresia
B: Ampullary carcinoma
Answer: B: Ampullary carcinoma 
Explanation: Reverse 3 sign of frost berg seen in ampullary carcinoma of pancreas.