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': 'Pleural fibrosis is caused by : a) Phenytoin b) Methysergide c) Amiodarone d) Ergotamine e) Ranitidine \nSelect and explain. \nA. ac, B. bd, C. bc, D. cd', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]