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
Radical cure of Plasmodium vivax is by : 
Select and explain. 
A. Chloroquine, B. Tetracycline, C. Primaquine, D. Artesunate
C: Primaquine
Answer: C: Primaquine 
Explanation: None