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: Pathology
[{'content': 'In malignant hypehermia the increased heat production is due to : \nSelect and explain. \nA. Increased muscle metabolism by excess of calcium ions, B. Thermic effect of food, C. Increased sympathetic discharge, D. Mitochondrial thermogenesis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Increased muscle metabolism by excess of calcium ions', 'role': 'assistant'}]