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: Pathology
In Werner Syndrome, the most common site of Gastrinoma is? 
Select and explain. 
A. Pancreas, B. Stomach, C. Small Intestine, D. Colon
C: Small Intestine
Answer: C: Small Intestine 
Explanation: "Gastrinomas are either associated with MEN I syndrome (30%) or sporadic (70%). Duodenal gastrinomas is the most frequent site for both the forms”
Most gastrinomas (50-70%) are present in the duodenum, followed by the pancreas (20-40%) and other intraabdominal sites (mesentery, lymph nodes, biliary tract, liver, stomach, ovary). Three cases with two extra abdominal sites have been described: gastrinomas of the left ventricular septum of the heart and non-small cell lung cancer. In MEN-1, the gastrinomas are also usually in the duodenum (70-90%) or the pancreas (10-30%), and they are almost always multiple.