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
A/E-are absorbed in the DCT 
Select and explain. 
A. Water, B. Potassium, C. Chloride, D. Sodium
B: Potassium
Answer: B: Potassium 
Explanation: Although K+ is also absorbed in DCT, secretion of K+ may exceed K+ absorption in this segment.