This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
All are the following are side effect of ropinirole except: 
Select and explain. 
A. Sedation, B. Nausea, C. Retroperitoneal Fibrosis, D. Hallucination
C: Retroperitoneal Fibrosis
Answer: C: Retroperitoneal Fibrosis 
Explanation: *Adverse effects of ropinirole and pramipexole include nausea, dizziness, hallucinations, postural hypotension and excessive day time sleepiness. *Their advantage over ergot derivatives like bromocriptine is lack of retroperitoneal fibrosis and gangrene and long duration of action. *Rapinirole has been approved by FDA for restless leg Syndrome. REF KD TRIPATHI 8TH ED.