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
Oliguric phase of renal failure, all are TRUE, EXCEPT: 
Select and explain. 
A. Hypercalcemia, B. Hyponatremia, C. Anaemia, D. Hyperkalemia
A: Hypercalcemia
Answer: A: Hypercalcemia 
Explanation: Answer is A (Hypercalcemia): The oliguric phase of acute renal failure is associated with hypocalcemia and not hypercalcemia The oliguric phase (maintenance phase) of acute renal failure is associated with uretnic and electrolyte complications. Metastatic deposition of calcium phosphate leads to hypocalcemia. Other factors that lead to hypocalcemia include tissue resistance to the actions of parathyroid hormone and reduced levels of vitamin D.