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: Pharmacology
An agent of choice in acute hypercalcemia due to malignancy is 
Select and explain. 
A. Calcitonin, B. Cholecalciferol, C. Teriperatide, D. Zolendronate
A: Calcitonin
Answer: A: Calcitonin 
Explanation: Calcitonin is the fastest acting followed by I.V bisphosphonates. hyperccalcimia in malignancy is mainly seen in tumors secreting Parathyroid hormone related peptide PTHrP. Ref: CMDT pg 801 2010 ed.