Answer :
Plasma cells: secrete antibodies.
The correct option is b.
Differentiated B-lymphocyte white blood cells called plasma cells are able to secrete immunoglobulin, or antibody. These cells, which are the primary cells in charge of humoral immunity, play a crucial part in the adaptive immune response.
White blood known as plasma cells, also referred to as plasma B cells or effector B cells, are white blood cells that develop from B lymphocytes in the lymphoid organs and secrete large amounts of proteins known as antibodies in response to being exposed to particular substances known as antigens.
The immune system employs antibodies, often referred to as immunoglobulins, to recognise and destroy foreign substances including harmful bacteria and viruses. The antigen, or distinctive molecule of the infection, is recognised by the antibody.
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