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': 'Thyrotoxic periodic paralysis (TPP) is usually due to hypokalemia. It is best treated with: \nSelect and explain. \nA. Potassium, B. Magnesium, C. Hydration, D. Propranolol', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Thyrotoxic periodic paralysis is due to hypokalemia. MUST KNOW Hypokalemia is profound and accompanied by hypophosphatemia and hypomagnesemia. MECHANISM: Direct and indirect activation of Na+,K+-ATPase Increased uptake of K+ by muscle and other tissues Inrease in beta adrenergic activity Propranolol (3 mg/kg) rapidly reverses the hypokalemia, hypophosphatemia, and paralysis. Ref: Harrison, Edition-18, page- 352.', 'role': 'assistant'}]