Cells obtained from cancerous tumours are known as

Options

A. Hybridoma
B. Lymphocyte
C. Monoclonal cells
D. Myeloma

Answer

To answer the question "Cells obtained from cancerous tumours are known as," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Options**: The question provides four options: hybridoma, lymphocyte, monoclonal cells, and myeloma. We need to analyze each term to determine which one refers to cells obtained from cancerous tumors.

2. **Defining Monoclonal Cells**: Monoclonal cells are derived from a single ancestral cell and are produced through repeated replication in culture. They are not specifically cancerous cells.

3. **Defining Hybridoma**: Hybridomas are created by fusing a specific type of lymphocyte (which can produce antibodies) with a myeloma cell (cancerous plasma cell). While hybridomas are involved in producing monoclonal antibodies, they are not directly referred to as cancerous cells themselves.

4. **Defining Lymphocyte**: Lymphocytes are a type of white blood cell involved in the immune response. They are not cancerous cells but can become cancerous in conditions such as leukemia or lymphoma.

5. **Defining Myeloma**: Myeloma refers specifically to cancerous plasma cells that originate from lymphocytes. These cells are indeed obtained from cancerous tumors, particularly in the context of multiple myeloma, a type of blood cancer.

6. **Conclusion**: Based on the definitions and understanding of these terms, the correct answer to the question is **myeloma**.

### Final Answer:
Cells obtained from cancerous tumors are known as **myeloma**.

---