Which option correctly lists the four types of adaptive immunity?

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Multiple Choice

Which option correctly lists the four types of adaptive immunity?

Explanation:
The question is about how adaptive immunity is categorized by how it is acquired and whether the response is active or passive. The four types are naturally acquired active immunity (the body’s own immune response after infection, with memory), artificially acquired active immunity (a vaccine prompts an active response and memory), naturally acquired passive immunity (maternal antibodies are passed to the fetus or via breast milk, providing immediate but temporary protection), and artificially acquired passive immunity (preformed antibodies are given directly, providing immediate protection without the recipient’s immune system actively responding). The other options mix in innate immunity or split responses into humoral/cellular or other scales that don’t yield the four categories of adaptive-immunity acquisition with active vs passive.

The question is about how adaptive immunity is categorized by how it is acquired and whether the response is active or passive. The four types are naturally acquired active immunity (the body’s own immune response after infection, with memory), artificially acquired active immunity (a vaccine prompts an active response and memory), naturally acquired passive immunity (maternal antibodies are passed to the fetus or via breast milk, providing immediate but temporary protection), and artificially acquired passive immunity (preformed antibodies are given directly, providing immediate protection without the recipient’s immune system actively responding). The other options mix in innate immunity or split responses into humoral/cellular or other scales that don’t yield the four categories of adaptive-immunity acquisition with active vs passive.