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 potassium ions secretion is seen in: \nSelect and explain. \nA. Saliva, B. Gastric secretions, C. Jejunal secretions, D. Colonic secretions', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Colonic secretions Ret Harrison I6/e p418 (Table 63-4) Enteric Fluid Volumes and Their Electrolyte Content L/d Na K CI HCO3 Saliva 1-2 10 30 10 30 Gastric juice 2 60 9 90 0 Bile 2-3 150 10 90 70 Small intestine 1 100 5 100 20 Colon variable 40 100 15 60', 'role': 'assistant'}]