A 70 year old male has a pathologic fracture of femur.The lesion appears a lytic on X-rays film with a circumscribed punched out appearance.The curetting from fracture is most likely to show which of the following ?

• A. Sheets of atypical plasma cells
• B. Diminished and thinned trabecular bone fragments secondary to osteopenia
• C. Malignant cells forming osteoid bone
• D. Metastatic prostatic adenocarcinoma