Which of the following is used in biowar?

Options

A. A pathogen
B. Toxin from a pathogen
C. A delivery system for the bioweapon agent
D. All of the above.

Answer

### Step-by-Step Solution:

1. **Understanding Biological Warfare (Biowar)**:
- Biological warfare, commonly referred to as biowar, involves the use of living organisms or their products to inflict harm during conflicts. This can include bacteria, viruses, fungi, or toxins derived from these organisms.

2. **Identifying the Components of Biowar**:
- The components that can be used in biowar include:
- **Pathogens**: These are complete microorganisms that can cause disease.
- **Toxins from Pathogens**: These are harmful substances produced by pathogens that can lead to severe health effects.
- **Delivery Systems for Bioweapon Agents**: These are methods or systems used to disseminate the biological agents effectively.

3. **Analyzing the Options**:
- Given the options:
- A) Pathogen
- B) Toxin from a pathogen
- C) A delivery system for bioweapon agent
- D) All of the above
- Each of the first three options (A, B, and C) is valid as they all can be utilized in biological warfare.

4. **Conclusion**:
- Since all the components listed in options A, B, and C are applicable to biowar, the correct answer is:
- **D) All of the above**.