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: Pharmacology
[{'content': 'Ringer lactate is a: March 2011 \nSelect and explain. \nA. Isotonic crystalloid solution, B. Hypeonic crystalloid solution, C. Hypotonic crystalloid solution, D. Isotonic colloid solution', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. A: Isotonic crystalloid solution Lactated Ringer\'s solution It is a solution that is isotonic with blood and intended for intravenous administration. It is grouped with intravenous fluids that are known as "crystalloids" - which include saline and dextrose solutions (compared to the "colloids" which contain larger molecules such as dextran, hydoxyethyl starch, polyvinylpyrrolidone or gelatin polymers/ Haemaccel). It is very similar, though not identical to, Hamann\'s Solution which has slightly different ionic concentrations One litre of lactated Ringer\'s solution contains: 130 mEq of sodium ion = 130 mmol/L; 109 mEq of chloride ion = 109 mmol/ L; 28 mEq of lactate = 28 mmol/L; 4 mEq of potassium ion = 4 mmol/L; 3 mEq of calcium ion = 1.5 mmol/L Although its pH is 6.5, it is an alkalizing solution.', 'role': 'assistant'}]