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: Medicine
Peptide YY is secreted by 
Select and explain. 
A. Stomach, B. Duodenum, C. Ileum, D. Pancreas
C: Ileum
Answer: C: Ileum 
Explanation: Peptide YY - ileum
Motilin - Duodenum and jejunum.