Which of the following pairs is mismatched? t cell : killing of virus-infected cells t cell activation : proliferation effector b cell : plasma cell plasma cell : antibody secretion

T cell activation : proliferation

Explanation:

The pairs that are correctly matched are:

Helper T cell: Killing of Virus infected cells

Helper T cells are also known as cytotoxic T cells which destroys cells with infected virus and tumor.

Plasma cell: Antibody Secretion

Plasma cell is also known as white blood cell. The cells are present in the bone marrow and secrete proteins called antibodies.

Effector B cell: Plasma cell

Plasma B cells are also known as Effector B cells.

Taking about,

T cell activation : proliferation

T cells are a type of lymphocytes that develops in the thymus gland. It is plays a central role in immune response. Thus, both T cell activation and proliferation are the different steps in the immune response by the T cell.

Thus, they are mismatched.