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': 'All of the following are true about Oliguric ARF \nSelect and explain. \nA. Anemia, B. Metabolic Acidosis, C. Uremia, D. Hypercalcemia', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer is D (Hypercalcemia): Oliguric ARF is associated with hypocalcemia and not hypercalcemia. Hypocalcemia is caused by metastatic deposition of calcium phosphate, tissue resistance to PTH and reduced levels of active vitamin D.', 'role': 'assistant'}]