<prompt> Note a delayed type of hypersensitive reactions -Contact dermatitisBronchial asthmaHemolytic anemiaMultiple sclerosis  <response>: Cntact dermatitis is a type IV hypersensitivity reaction. - delayed hypersensitivity sometimes results results from skin contact with a variety of chemicals Metals such as nickel and chromium, simple chemicals like dyes,drugs or plant allergens. The antigen activates specifically sensitised CD4 CD8 T lymphocytes leading to the secretion of lymphokines and phagocyte accumulation. Reference : Anathanarayan panikers 9th edition, pg no: 162,167 p 