This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: NSAIDs, Gout and Rheumatoid Ahritis, Subject name: Pharmacology
Denosumab is used in:- 
Select and explain. 
A. Osteomalacia, B. Osteoahritis, C. Osteoporosis, D. Osteosarcoma
C: Osteoporosis
Answer: C: Osteoporosis 
Explanation: Denosumab is a monoclonal antibody against RANK - ligand which inhibits binding to RANK receptor and inhibits the activation of osteoclasts and inhibits bone resorption so it is used in treatment of Osteoporosis.