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
Which of the following antiparkinsonian drugs directly activates dopaminergic D2 receptors in the striatum? 
Select and explain. 
A. Pramipexole, B. Entacapone, C. Benserazide, D. Selegiline
A: Pramipexole
Answer: A: Pramipexole 
Explanation: (Ref: KDT 6/e p419, 420) Directly acting D2 receptor agonists can be Ergot derivatives e.g. bromocriptine and pergolid Non-ergot compounds e.g. pramipexole and ropinirole