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: Medicine
[{'content': 'Muscular weakness due to deficiency of magnesium is enhanced by presence of: \nSelect and explain. \nA. Hyperkalemia, B. Metabolic alkalosis, C. Metabolic acidosis, D. Hypernatremia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Answer is C (Metabolic acidosis):', 'role': 'assistant'}]