Most widely used bioweapon is

Options

A. Bacillus subtilis
B. Pseudomonas putida
C. Bacillus anthracis
D. None of these

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the most widely used bioweapon among the given options: Bacillus subtilis, Pseudomonas putida, Bacillus anthracis, and none of these.

2. **Analyzing the First Option - Bacillus subtilis**:
- Bacillus subtilis is a gram-positive, spore-forming bacterium.
- It is known to be non-pathogenic and has various beneficial uses, such as acting as a probiotic and being used in agriculture.
- Since it is non-pathogenic, it cannot be classified as a bioweapon.
- **Conclusion**: This option is incorrect.

3. **Analyzing the Second Option - Pseudomonas putida**:
- Pseudomonas putida is a gram-negative, rod-shaped bacterium found in soil and water.
- It is primarily used in bioremediation and organic synthesis and acts as a biocontrol agent.
- It is not known to be pathogenic, which disqualifies it from being a bioweapon.
- **Conclusion**: This option is also incorrect.

4. **Analyzing the Third Option - Bacillus anthracis**:
- Bacillus anthracis is a gram-positive, rod-shaped bacterium.
- It is known to be pathogenic and is the causative agent of anthrax, a serious disease that affects both humans and livestock.
- Anthrax can manifest in different forms, including cutaneous and inhalation anthrax, both of which can be deadly.
- Due to its pathogenic nature and the severe effects of the disease it causes, Bacillus anthracis is recognized as a bioweapon.
- **Conclusion**: This option is correct.

5. **Analyzing the Fourth Option - None of These**:
- Since we have identified Bacillus anthracis as the most widely used bioweapon, this option is incorrect.

### Final Answer:
The most widely used bioweapon is **Bacillus anthracis** (Option C).

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