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': 'All of the following are side efffect of ropinirole except: \nSelect and explain. \nA. Sedation, B. Nausea, C. Retroperitoneal Fibrosis, D. Hallucination', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]