This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
Bleomycin toxicity affects which type of cells : 
Select and explain. 
A. Type–I pneumocytes, B. Type–II pneumocytes, C. Endothelial cells, D. Pulmonary alveolar macrophages
A: Type–I pneumocytes
Answer: A: Type–I pneumocytes 
Explanation: 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.