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Question

Acquired immunity is due to

A
Physiological and inflammatory barrier
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B
Lymphocytes
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C
Erythrocytes
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D
NK cells
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Solution

The correct option is C Lymphocytes
Acquired immunity is a type of immunity which is not present at birth. It is learned. As a person's immune system encounters various antigens, the components of acquired immunity find the best way to attack each antigen and begins to develop a memory for that antigen. It is also called specific immunity. Acquired immunity takes time to develop after initial exposure to a new antigen.
Lymphocytes are the type of white blood cell responsible for acquired immunity. Acquired immune response begins with antibodies, produced by B cells or B lymphocytes.
Thus, the correct answer is the option (D), 'Lymphocytes'.

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