What is true for monoclonal antibodies : -

Options

A. These antibodies obtained from one parent and for one antigen
B. These obtained from different parents and for one antigen
C. These obtained from one parent and for many antigens
D. These obtained from many parents and for many antigen

Answer

To solve the question regarding monoclonal antibodies, we need to analyze each option provided and determine which statement is true based on our understanding of monoclonal antibodies.

### Step-by-Step Solution:

1. **Understanding Monoclonal Antibodies**:
- Monoclonal antibodies are antibodies that are made by identical immune cells, which are clones of a unique parent cell. They are designed to bind to a specific antigen.

2. **Analyzing the Options**:
- **Option A**: These antibodies are obtained from one parent and for one antigen.
- This statement is true. Monoclonal antibodies are produced from a single clone of B cells, which means they originate from one parent cell and target a specific antigen.

- **Option B**: These are obtained from different parents and for one antigen.
- This statement is false. Monoclonal antibodies come from a single parent cell, not multiple parents.

- **Option C**: These are obtained from one parent and for many antigens.
- This statement is false. Monoclonal antibodies are specific to one antigen, not multiple.

- **Option D**: These are obtained from many parents and for many antigens.
- This statement is false. Monoclonal antibodies are derived from one parent and target one specific antigen.

3. **Conclusion**:
- The only statement that accurately describes monoclonal antibodies is **Option A**: "These antibodies are obtained from one parent and for one antigen."

### Final Answer:
- The correct answer is **Option A**.

---