A renal biopsy from a 56 year old woman with progressive renal failure for the past 3 years, shows glomerular and vascular deposition of pink amorphous material. It shows apple-green birefringence under polarized light after Congo red staining. These deposits are positive for lambda light chains. The person is most likely to suffer from: (A) Rheumatoid arthritis, (B) Tuberculosis, (C) Systemic lupus erythematosus, (D) Multiple myeloma
Answer is D. None