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
Antiparkinson drug known to cause cardiac valvular fibrosis is: 
Select and explain. 
A. Levodopa, B. Ropinirole, C. Pramipexole, D. Pergolide
D: Pergolide
Answer: D: Pergolide 
Explanation: None