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When a host is exposed to antigens whi...

When a host is exposed to antigens which may be in the form of living or dead microbes or other proteins antibodies are produced in the host body. This type of immunity is called

A

Active immunity

B

Passive immunity

C

Auto immunity

D

Allergy

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Immunity**: Immunity is the body's ability to resist infections and diseases. It can be classified into different types based on how it is acquired. 2. **Identifying Antigens**: Antigens are substances that trigger an immune response. They can be in the form of living or dead microbes or other proteins. 3. **Antibody Production**: When a host is exposed to antigens, the immune system responds by producing antibodies. These antibodies are specific proteins that help neutralize or eliminate the antigens. 4. **Types of Immunity**: There are several types of immunity: - **Active Immunity**: This occurs when the body is exposed to a pathogen and produces antibodies in response. This can happen through infection or vaccination. - **Passive Immunity**: This involves the transfer of ready-made antibodies from one individual to another, such as from mother to baby through breast milk. - **Autoimmunity**: This is a condition where the immune system mistakenly attacks the body's own healthy cells. - **Allergy**: This refers to the immune system's overreaction to harmless substances, leading to inflammatory responses. 5. **Conclusion**: Given that the question specifies that antibodies are produced in response to exposure to antigens, the type of immunity being described is **Active Immunity**. This is because the body actively produces its own antibodies after encountering the antigens. **Final Answer**: The type of immunity described is **Active Immunity**. ---
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