The types of immune cells that circulate in the body and provide immunity by producing antibodies are known as B cells. Thus, the correct option is D.
What is Antibody?
An Antibody may be defined as a type of protein that is synthesized by the plasma cells of B lymphocytes in response to specific antigens. It is a Y-shaped molecule with diverse forms.
B lymphocyte is one of the main types of lymphocytes that are classified under white blood cells which are the essential part of an immune system. B cells are further classified into plasma cells and memory cells. Plasma cells are responsible for the formation of antibodies that provides adaptive immunity.
Therefore, the types of immune cells that circulate in the body and provide immunity by producing antibodies are known as B cells. Thus, the correct option is D.
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