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
All of the following are true about Oliguric ARF 
Select and explain. 
A. Anemia, B. Metabolic Acidosis, C. Uremia, D. Hypercalcemia
D: Hypercalcemia
Answer: D: Hypercalcemia 
Explanation: 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.