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
[{'content': 'Pulmonary fibrosis is seen with : \nSelect and explain. \nA. Bleomycin, B. Cisplatin, C. Methotrexate, D. Actinomycin D', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bleomycin is a marrow sparing drug but it causes pulmonary fibrosis and skin toxicity as adverse effects. Another antican\xadcer drug causing pulmonary fibrosis is busulfan.', 'role': 'assistant'}]