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: Physiology
[{'content': 'Maximum K+ concentration is seen in ___________ \nSelect and explain. \nA. Saliva, B. Colon, C. Small intestine, D. Stomach', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Maximum K+\xa0\xa0secretion occurs in saliva.\nMaximun\xa0K+\xa0concentration occurs in colon.', 'role': 'assistant'}]