This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Which hormone stimulates pancreatic secretion that is rich in bicarbonate? \nSelect and explain. \nA. Somatostatin, B. Secretin, C. CCK, D. Gastrin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]