This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Disorder of Metabolism & Connective Tissue, Subject name: Medicine
Prolonged immobilization leads to ? 
Select and explain. 
A. Hypercalcemia, B. Hypocalcemia, C. Hyperkalemia, D. Hypokalemia
A: Hypercalcemia
Answer: A: Hypercalcemia 
Explanation: Ans. is 'a' i.e., Hypercalcemia o Immobilization can lead to bone resorption sufficient to cause hvpercalceiaThe immobilization is usually caused by spinal cord injury or extensive casting after fractures, although it can occur in settings such as Parkinson s disease.Hypercalcemia of immobilization occurs predominantly in the young and in patients with other reasons for a high rate of bone turnover such as Paget's disease or extensive fractures.