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': 'All except one \xadare absorbed in the DCT: \nSelect and explain. \nA. Water, B. Potassium, C. Chloride, D. Sodium', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Although\xa0K+\xa0is\xa0also\xa0absorbed\xa0in\xa0DCT, secretion of K+\xa0may exceed K+\xa0absorption in\xa0this segment. So, B should be the most appropriate answer.', 'role': 'assistant'}]