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
Drugs used for the treatment of Parkinson's disease include:– 
Select and explain. 
A. Levodopa, B. Bromocriptine, C. Benserazide, D. All of these
D: All of these
Answer: D: All of these 
Explanation: Levodopa, bromocriptine and benserazide are used in Parkinsonism.
Mazindol is a potent anorectic agent. It has an additional peripheral effect of increasing metabolic rate.
Acyclovir is an antiviral agent, not used in parkinsonism.