Which of the following is used as a bioweapon ?

Options

A. Bacillus subtilis
B. Bacillus licheniformis
C. Bacillus thuringiensis
D. Bacillus anthracis

Answer

**Step-by-Step Solution:**

1. **Understanding Bioweapons**: Begin by defining what a bioweapon is. A bioweapon is a microorganism (such as a virus, bacteria, or fungi) that is deliberately produced or released to cause widespread disease and death in a population, which can include plants, animals, or humans.

2. **Analyzing the Options**: Look at the provided options one by one to determine if they are harmful and could potentially be used as bioweapons.

- **Bacillus subtilis**: This bacterium is not harmful and is used as a fungicide in agriculture. Therefore, it is not a bioweapon.

- **Bacillus leuciniformis**: Similar to Bacillus subtilis, this bacterium is also not harmful and is used to promote plant growth and yield. Hence, it is not a bioweapon.

- **Bacillus thuringiensis**: This bacterium is used as a bio-insecticide to kill certain insects. It is not harmful to humans or animals, so it cannot be classified as a bioweapon.

- **Bacillus anthracis**: This bacterium causes anthrax, a serious disease that can lead to severe infections in humans, including skin and respiratory issues. Because it can cause significant harm and is associated with bioweapon use, it is the correct answer.

3. **Conclusion**: The only option that qualifies as a bioweapon is **Bacillus anthracis**.

**Final Answer**: Bacillus anthracis

---