This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrinology, Subject name: Medicine
[{'content': 'Primary hyperaldosteronism what is seen \nSelect and explain. \nA. Hyperkalemia, B. Hyponatremia, C. Maetabolic alkolosis, D. Fall in aldosterone with sodium loading', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The clinical hallmark of mineralocoicoid excess is hypokalemic hypeension Due to excess mineralocoicoid action lead to potassium and H+ depletion sodiu retention Serum sodium tends to normal due to concurrent fluid retention Because of h+ depletion lead to metabolic alkalosis Clinical features: 1) hypokalemia 2) hypeension at young age generally <40 3) metabolic alkalosis 4)muscle cramps in severe case tetany due to metabolic alkalosis', 'role': 'assistant'}]