Assertion (A): Artificial chemicals are injected through vaccination.
Reason (R): Vaccination is a process of immunization.

Options

A. Both A and R are true and R is the correct explanation for A.
B. Both A and R are true, but R is not the correct explanation for A.
C. A is true and R is false.
D. A is false and R is true.

Explanation

To analyze the assertion and reason given in the question, we can break it down into a step-by-step solution:

### Step-by-Step Solution:

1. **Understand the Assertion (A)**:
- The assertion states that "Artificial chemicals are injected through vaccination."
- This implies that the vaccination process involves the injection of synthetic or artificial substances.

2. **Evaluate the Assertion**:
- Vaccination typically involves the introduction of weakened or inactivated forms of pathogens (like viruses or bacteria) or their components (like proteins) to stimulate an immune response.
- It does not primarily involve the injection of artificial chemicals. Therefore, the assertion is **false**.

3. **Understand the Reason (R)**:
- The reason states that "Vaccination is a process of immunization."
- Immunization is indeed the process of making a person or animal immune to an infection, which is the primary goal of vaccination.

4. **Evaluate the Reason**:
- Vaccination works by exposing the immune system to a harmless form of the pathogen, prompting the body to produce antibodies. This process is correctly described as immunization. Therefore, the reason is **true**.

5. **Conclusion**:
- The assertion is false, while the reason is true.
- Therefore, the correct relationship is that the assertion is incorrect, but the reason is correct.

### Final Answer:
- The assertion (A) is false, and the reason (R) is true.