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: Biochemistry
[{'content': 'Hypermagnesemia may be observed in: \nSelect and explain. \nA. Hyperparathyroidism, B. Diabetes mellitus, C. Kwashiorkor, D. Primary aldosteronism', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B. Diabetes mellitusMagnesium is the fourth most abundant and important cation in humans. Hypermagnesemia is associated with Uncontrolled Diabetes mellitus, Hypothyroidism, Advanced renal failure and acute renal failure.', 'role': 'assistant'}]