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': 'Which of the following is a feature of primary adrenal coical failure ? \nSelect and explain. \nA. Hypopigmentation, B. Sodium and water depletion, C. Hypeension, D. Hypokalemia', 'role': 'user'}, {'content': 'Answer: B \nExplanation: hyper pigmentation, hypotension and hyperkalemia . there is hyponatremia due to sodium lodmss in urine due to aldosterone deficiency ( Harrison 17 pg 2264)', 'role': 'assistant'}]