This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Endocrinology), Subject name: Medicine
[{'content': 'Somatostatin is secreted by : \nSelect and explain. \nA. D-cell, B. A-cell, C. B-cell, D. Dl-cell', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is A D-cell (Ref Ganong, 20/e, p. 339). Delta cells secrete - somatostatin* Beta cells secrete - insulin* Alpha cells of pancreas - glucagon*', 'role': 'assistant'}]