The opposite to innate immunity is-

Passive immunity

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Acquired immunity

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Phagocytosis

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T cells immunity

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Solution

The correct option is B Acquired immunity
The second line of defense against non-self-pathogens is called adaptive immune response. Adaptive immunity is also referred to as acquired immunity or specific immunity and is only found in vertebrates. Innate immunity is present by birth but acquired immunity develops after birth.
Passive immunity is provided when a person is given antibodies from outside.
So, the correct answer is- acquired immunity.

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