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': 'Ringer lactate contains all EXCEPT: \nSelect and explain. \nA. Chloride, B. Sodium, C. Bicarbonate, D. Potassium', 'role': 'user'}, {'content': 'Answer: C \nExplanation: C i.e. Bicarbonate', 'role': 'assistant'}]