Which of the following is an example of adaptive immunity?

• A. Active Immunity
• B. Passive Immunity
• C. Innate Immunity
• D. Adaptive Immunity

Answer: (D)

Adaptive immunity is the body's learned, specific defense that uses B and T lymphocytes to recognize antigens and create targeted responses. It not only fights the current infection but also creates immunological memory, so future exposures are faster and stronger. The best example among these terms is the one that names this entire arm of the immune system, because it precisely signals a response that is tailored to a specific pathogen and capable of memory. Innate immunity is the non-specific first line that acts quickly but does not adapt or remember. Active immunity describes the host actively developing protection after exposure or vaccination, which is a form of adaptive immunity, but the term that directly exemplifies adaptive immunity is the one that names the adaptive system itself.