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: Anaesthesia
[{'content': 'Massive transfusion of citrated blood leads to all except \nSelect and explain. \nA. Metabolic acidosis, B. Hypothermia, C. Hyponatremia, D. Hypocalcemia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Massive blood transfusion results in\n\nMetabolic acidosis( lactate from RBCs, citric acid as anticoagulant)\nHyperkalemia( stored blood K+ reaches 30mmol/L after 3 weeks)\nHypothermia (as stored blood is kept at 4°C)\nDecreased ionized calcium( due to citrate binding to calcium).', 'role': 'assistant'}]