<prompt> Denosumab is a monoclonal antibody used for the treatment of:OsteomalaciaOsteoahritisOsteoporosisBreast carcinoma  <response>: 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. 