Assertion: Vaccination is also called preventive inoculation.
Reason: A vaccine prevents the formation of antibodies inside the body.

Answer

To address the question regarding the assertion and reason provided, we can break down the solution into clear steps:

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Vaccination is also called preventive inoculation."
- Vaccination involves introducing a vaccine into the body to stimulate the immune system to recognize and fight off specific pathogens in the future. This aligns with the concept of "preventive inoculation," as it aims to prevent disease before it occurs.

2. **Understanding the Reason**:
- The reason given is that "A vaccine prevents the formation of antibodies inside the body."
- This statement is misleading. Vaccines actually stimulate the immune system to produce antibodies against the pathogen. Therefore, the reason is incorrect.

3. **Evaluating the Truth of Each Statement**:
- The assertion is true because vaccination is indeed a form of preventive inoculation.
- The reason is false because vaccines promote the formation of antibodies, not prevent it.

4. **Conclusion**:
- Based on the evaluation, we conclude that the assertion is true, while the reason is false.

### Final Answer:
- Assertion: True
- Reason: False