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
Pleural fibrosis is caused by : a) Phenytoin b) Methysergide c) Amiodarone d) Ergotamine e) Ranitidine 
Select and explain. 
A. ac, B. bd, C. bc, D. cd
C: bc
Answer: C: bc 
Explanation: None