Antibody mediated immune system protects the body against

Options

A. viruses
B. bacteria
C. toxins
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding Antibody-Mediated Immunity:**
- The antibody-mediated immune system is also known as humoral immunity. This type of immunity primarily involves B-cells and the antibodies they produce.

2. **Role of B-cells and T-cells:**
- B-cells, upon activation by helper T-cells, differentiate into plasma B-cells. These plasma B-cells are responsible for producing antibodies that target specific antigens.

3. **Target of Humoral Immunity:**
- The humoral immune response specifically targets pathogens that are present in body fluids, which includes viruses, bacteria, and toxins. This means that it is effective against pathogens that are circulating freely in the body or are outside of infected cells.

4. **Identifying the Correct Answer:**
- Since humoral immunity protects against a variety of pathogens, including viruses, bacteria, and toxins, the correct answer to the question "Antibody mediated immune system protects the body against" is "all of these."

5. **Final Answer:**
- Therefore, the answer is option 4: all of these.

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