This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Physiology
[{'content': '1 cells of duodenum secrete \nSelect and explain. \nA. Secretin, B. Gastrin, C. CCK, D. Motilin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Enteroendocrine cells (EEC) secrete key gastrointestinal (GI) hormones such as gastric-inhibitory peptide (GIP), cholecystokinin (CCK) and ghrelin that are involved in nutrient sensing pathways and are often implicated in GI pathology. EEC is also known as I cells. Ref: www.pshysoc.org', 'role': 'assistant'}]