The correct option is B Myelomas
Hybridomas are produced by injecting a specific antigen into a mouse, collecting an antibody-producing cell from the mouse's spleen and fusing it with a tumour cell called as a myeloma cell.
Myeloma cells are found in the cancer of myeloma, that affects the cells in the bone marrow and plasma.
Lymphocytes are the type of white blood cells.
Monoclonal cells are a group of cells produced from a single ancestral cell by repeated cellular replication.
Thus, the correct answer is option B.