<prompt> Bleomycin toxicity affects which type of cells :TypeI pneumocytesTypeII pneumocytesEndothelial cellsPulmonary alveolar macrophages  <response>: Bleomycin causes necrosis of Type I pneumocytes that results in compensatory hyperplasia of type-II pneumocytes. The same kind of injury can also occur in response to radiations. In experimental models, this type of injury has been ameliorated by keratinocyte growth factor. 