A Study of Bortezomib, Lenalidomide and Dexamethasone (VRd) Followed by Cilta-cel, a CAR-T Therapy Directed Against BCMA Versus VRd Followed by Lenalidomide and Dexamethasone (Rd) Therapy in Participants With Newly Diagnosed Multiple Myeloma for Whom ASCT is Not Planned as Initial Therapy

Prior treatment

• Known active, or prior history of central nervous system (CNS) involvement or clinical signs of meningeal involvement of MM
• Vaccinated with live, attenuated vaccine within 4 weeks prior to first dose of VRd
• Prior treatment with chimeric antigen receptor T (CAR-T) therapy directed at any target
• Any therapy that is targeted to B-cell maturation antigen (BCMA)

Other illness

• Peripheral neuropathy or neuropathic pain Grade 2 or higher, as defined by the National Cancer Institute-Common Terminology Criteria for Adverse Events (NCI-CTCAE) Version 5
• Stroke or seizure within 6 months of signing Informed Consent Form (ICF)
• Seropositive for human immunodeficiency virus (HIV)
• Hepatitis B infection
• Hepatitis C infection

Other

• Frailty index of \>=2 according to Myeloma Geriatric Assessment score
• Participant must not require continuous supplemental oxygen

• Documented diagnosis of multiple myeloma (MM) according to International Myeloma Working Group (IMWG) diagnostic criteria
• Measurable disease at screening as defined by any of the following: Serum monoclonal paraprotein (M-protein) level greater than or equal to (\>=)1.0 gram per deciliter (g/dL) or urine M-protein level \>=200 milligram (mg)/24 hours; or Light chain MM in whom only measurable disease is by serum free light chain (FLC) levels: Serum immunoglobin (Ig) free light chain \>=10 milligrams per deciliter (mg/dL) and abnormal serum Ig kappa/lambda FLC ratio
• Eastern Cooperative Oncology Group Performance Status grade of 0 or 1
• Not considered for high-dose chemotherapy with Autologous Stem Cell Transplant (ASCT) due to: Ineligible due to advanced age; or Ineligible due to presence of comorbid condition(s) likely to have a negative impact on tolerability of high-dose chemotherapy with ASCT; or Deferral of high-dose chemotherapy with ASCT as initial treatment
• A woman of childbearing potential (WOCBP) must have 2 negative highly sensitive serum or urine pregnancy tests (beta-human chorionic gonadotropin) prior to starting Bortezomib, Lenalidomide and Dexamethasone (VRd) and must agree to further testing during the study.
• Clinical laboratory values meeting the following criteria during the screening phase: hemoglobin greater than or equal to (\>=) 8.0 g/dL (\>=5 millimoles per liter \[mmol/L\]), recombinant human erythropoietin use is permitted; platelets \>=75 \*10\^9/L; absolute lymphocyte count \>=0.3 \*10\^9/L; absolute neutrophil count (ANC) \>=1.0 ×10\^9/L (prior growth factor support is permitted but must be without support in the 7 days prior to the laboratory test); aspartate aminotransferase (AST) and alanine aminotransferase (ALT) less than or equal to (\<=) 3.0 \* upper limit of normal (ULN); estimated glomerular filtration rate \>=40 milliliter per minute/1.73 meter square (mL/min/1.73 m\^2) based upon modified diet in renal disease formula (MDRD-4) calculation or a 24-hour urine collection; total bilirubin \<=2.0 \* ULN; except in participants with congenital hyperbilirubinemia, such as Gilbert syndrome (in which case direct bilirubin \<=2.0 \* ULN is required)