Resistance developed in an individual as a result of antigenic stimulus is

Options

A. Natural immunity
B. Active acquired immunity
C. Passive acquired immunity
D. Artificial immunity

Answer

To solve the question "Resistance developed in an individual as a result of antigenic stimulus is," we need to analyze the options provided and understand the concepts of immunity.

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking about the type of immunity that develops in response to an antigenic stimulus. An antigen is a foreign substance that triggers an immune response in the body.

2. **Identify the Options**: The options given are:
- A) Natural immunity
- B) Active acquired immunity
- C) Passive acquired immunity
- D) Artificial immunity

3. **Analyze Each Option**:
- **Natural Immunity**: This type of immunity is inherent and does not require exposure to an antigen. It is not developed through an antigenic stimulus, so this option is incorrect.

- **Active Acquired Immunity**: This occurs when the body is exposed to an antigen and responds by producing antibodies. This is a direct response to the antigenic stimulus, making this option a strong candidate.

- **Passive Acquired Immunity**: This involves the transfer of antibodies from another source (like maternal antibodies to a baby) rather than the individual's own immune response to an antigen. Therefore, this option is also incorrect.

- **Artificial Immunity**: This is induced through medical interventions, such as vaccinations, where an antigen is introduced to stimulate an immune response. However, it is still a form of active immunity since the body produces its own antibodies in response to the antigen.

4. **Conclusion**: Based on the analysis, the correct answer is **B) Active acquired immunity**. This type of immunity is specifically developed in response to an antigenic stimulus, where the body produces its own antibodies.

### Final Answer:
**B) Active acquired immunity**