Autoantibodies are probably involved in:

a. reactions to poison ivy

b. pollen allergies

c. systemic lupus erythematosus

d. HIV/AIDS

A kind of hypersensitivity to self-antigens, which influences about 5 percent of the population is known as autoimmunity. The majority of the kind of autoimmunity comprise the humoral immune response.

AIDS or Acquired Immunodeficiency Syndrome is not a result of autoantibodies. It is a viral disease resulting due to a virus HIV or human immunodeficiency virus.

The maladaptive immune responses against the self-antigens or harmless foreign substances, which take place post tissue sensitization are known as hypersensitivities.

The reaction to poison ivy is an outcome of delayed hypersensitivity. A cell-mediated immune response, which occurs about one to two days post-secondary exposure for a maximal reaction to be witnessed is termed delayed hypersensitivity.

Type I, II and III hypersensitivity reactions are called immediate hypersensitivity reactions as they take place within twenty-four hours of coming in contact with the antigen or allergen. The allergy to pollen is classified as immediate hypersensitivity.

Thus, the options a, b and d are incorrect.

The antibodies, which inappropriately mark self-constituents as foreign are known as autoantibodies. In systemic lupus erythematosus, a diffuse antibody response to the own proteins and DNA or a person results in different systemic diseases.

The systemic lupus erythematosus may influence the joints, heart, kidneys, lungs, skin, central nervous system, and other tissues resulting in tissue destruction through complement activation, antibody binding, inflammation, and lysis.

Hence, the correct answer is option c.