This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Perioperative Fluids, Subject name: Anaesthesia
[{'content': 'How much Potassium is present in the Ringer Lactate solution? \nSelect and explain. \nA. 1 mEq/L, B. 4 mEq/L, C. 2 mEq/L, D. 6 mEq/l', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Crystalloid pH mOsm/L Na+ CI- Ca2+ Lactate- K+ Mg2+ Gluconate- Acetate- NS (0.9% Saline) 5.6 (4.5 - 7.0) 308o 154o 154 RL 6.6 (6.0 - 7.5) 274 130 109 3 28 4 Normosol 7.4 (6.5-7.6) 295 140 98 5 3 23 27', 'role': 'assistant'}]