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
All are true about Busulfan except 
Select and explain. 
A. It is an alkylating anti neoplastic drug, B. It can result in Addinson's disease, C. It can also cause veno occlusive disease of liver, D. It can lead to pulmonary fibrosis, characterized by necrosis of Type 2 pneumocytes
D: It can lead to pulmonary fibrosis, characterized by necrosis of Type 2 pneumocytes
Answer: D: It can lead to pulmonary fibrosis, characterized by necrosis of Type 2 pneumocytes 
Explanation: Busulfan can lead to pulmonary fibrosis, characterized by necrosis of Type1 pneumocytes and compensatory proliferation of Type 2 pneumocytes.