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
The triad of diabetes, gallstones, and steatorrhea is associated with which one of the following? 
Select and explain. 
A. Gastrinomas, B. Somatostatinomas, C. VIPomas, D. Glucagonomas
B: Somatostatinomas
Answer: B: Somatostatinomas 
Explanation: Somatostatinomas Somatostatinomas are associated with the clinical triad of diabetes, steatorrhea, and gallstones. Gastrinomas, which cause Zollinger-Ellison syndrome, are associated with recurrent peptic ulcer disease, diarrhea, and multiple endocrine neoplasia, type I (MEN-I) syndrome in 20% of patients. VIPoma (pancreatic cholera, Verner-Morrison syndrome, and the watery diarrhea, hypokalemia and achlorhydria syndrome) is a non-a, non-beta islet cell tumor that secretes vasoactive intestinal peptide (VIP), leading to watery diarrhea. Glucagonomas are characterized by a syndrome of diabetes mellitus, weight loss, anemia, and a rash (migratory necrolytic erythema). Insulinomas are characterized by high insulin levels in the presence of hypoglycemia.