Disease associated with secretion of toxin is

Options

A. Tetanus
B. T.B.
C. Food poisoning
D. AIDS.

Answer

To solve the question regarding the disease associated with the secretion of toxins, we will analyze each option provided:

1. **Tetanus**: This disease is caused by the bacterium *Clostridium tetani*, which secretes a neurotoxin known as tetanospasmin. This toxin affects the nervous system, leading to muscle stiffness and spasms, commonly referred to as "lockjaw." This indicates that tetanus is indeed associated with the secretion of a toxin.

2. **Tuberculosis (TB)**: TB is caused by the bacterium *Mycobacterium tuberculosis*. While it can cause severe illness, it does not primarily operate through the secretion of toxins. Instead, it leads to disease through immune response and tissue damage.

3. **Food Poisoning**: This term generally refers to a variety of illnesses caused by consuming contaminated food. Some types of food poisoning can be associated with toxins (like those produced by *Staphylococcus aureus*), but it is a broad category and not a specific disease linked to a single toxin-producing organism.

4. **AIDS**: Acquired Immunodeficiency Syndrome (AIDS) is caused by the Human Immunodeficiency Virus (HIV). This virus does not secrete toxins; rather, it attacks the immune system directly.

Based on this analysis, the disease that is most clearly associated with the secretion of a toxin is **tetanus**.

### Final Answer:
The disease associated with the secretion of toxin is **Tetanus**.