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': 'Glucose sympo occurs with: \nSelect and explain. \nA. Na+, B. Ca++, C. K+, D. Cl-', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Na+', 'role': 'assistant'}]