<prompt> Hypersensitivity vasculitisis seen most commonly inPost capillary venulesArteriolesVeinsCapillaries  <response>: HYPERSENSITIVITY VASCULITISIn hypersensitivity vasuculitis, postcapillaryvenules are the most commonly involved vessels, capillaries and arterioles are involved less frequently.It is primarily a disease of small vessels.It is characterized by leukocytoclasis, a term that refers to the nuclear debris remaining from the neutrophils that have infiltrated in and around the vessels during the acute stages. 