This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal System, Subject name: Physiology
[{'content': 'Gastric acid secretion is decreased by all except: \nSelect and explain. \nA. Somatostatin, B. Histamine, C. Cholecystokinin, D. Prostaglandins', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Enteric hormones that inhibit H+ secretion Hormone Source CCK I cells of duodenum and jejunum and neurons in ileum and colon Secretin S cells in small intestine VIP ENS neurons GIP K cells in duodenum and jejunum Neurotensin Endocrine cells in ileum Peptide YY Endocrine cells in ileum and colon Somatostatin D cells of stomach and duodenum, & cells of pancreatic islets', 'role': 'assistant'}]