This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
The triad of diabetes, gallstones and steatorrhoea is associated with which one of the following tumors? 
Select and explain. 
A. Gastrinomas, B. Somastostationomas, C. VIPomas, D. Glucagonomas
B: Somastostationomas
Answer: B: Somastostationomas 
Explanation: Somatostatinoma syndrome is a triad of diabetes mellitus, diarrhea and gallstones, but also includes weight loss and hypochlorhydria.