This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Anatomy
[{'content': "Which of the following adverse effects of levodopa is not minimized even after combining it with carbidopa? \nSelect and explain. \nA. Involuntary movements, B. Nausea and vomiting, C. Cardiac arrhythmia, D. 'On-off' effect", 'role': 'user'}, {'content': 'Answer: A \nExplanation: (Ref: KDT 6/e p419) Carbidopa can decrease all the adverse effects of levodopa except Involuntary movements Behavioural effects', 'role': 'assistant'}]