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: Social & Preventive Medicine
[{'content': 'Ringer lactate true is \nSelect and explain. \nA. Cl- - 111, B. Na+ - 45, C. K+ - 5, D. Lactate – 29', 'role': 'user'}, {'content': 'Answer: D \nExplanation: • Composition of Ringer Lactate:\n– Sodium ion: 130 mmol/L\n– Potassium ion: 4 mmol/L\n– Chloride ion: 109 mmol/L\n– Calcium ion: 1.5 mmol/L\n– Lactate ion: 28 mmol/L', 'role': 'assistant'}]