A Study to Compare Linvoseltamab Monotherapy and Linvoseltamab + Carfilzomib Combination Therapy With Standard-of-Care Combination Regimens in Adult Participants With Relapsed/Refractory Multiple Myeloma (RRMM)

Key Inclusion Criteria: 1. Participant with RRMM who received at least 1 but not more than 3 prior lines of therapy, which must have included treatment with lenalidomide and either a Protease Inhibitor (PI) or anti-CD38 monoclonal antibody 2. Eastern Cooperative Oncology Group (ECOG) performance status score ≤2 3. Confirmed progressive disease according to IMWG criteria during or after the most recent line of therapy Key Exclusion Criteria: 1. Prior treatment with a T cell-based immunotherapy targeting BCMA, including BCMA-directed bispecific antibodies, Bispecific T-cell Engagers (BiTEs), and Chimeric Antigen Receptor (CAR) T cells. Antibody-drug conjugates targeting BCMA (eg, belantamab mafodotin) are not excluded 2. Diagnosis of plasma cell leukemia, symptomatic amyloidosis (including myeloma-associated amyloidosis), Waldenström macroglobulinemia (lymphoplasmacytic lymphoma), or POEMS syndrome (polyneuropathy, organomegaly, endocrinopathy, monoclonal protein, and skin changes) 3. Known Central Nervous System (CNS) involvement of myeloma including meningeal involvement 4. History of neurodegenerative condition, Progressive Multifocal Leukoencephalopathy (PML), or CNS movement disorder NOTE: Other protocol defined inclusion/exclusion criteria apply