This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
A 40yr old patient developed high fever of sudden onset .Peripheral blood film showed malaria parasite pigment was yellowish brown and schizonts were 9-10microns and contained 20 merozoites each 
Select and explain. 
A. Pl vivax, B. Pl falciparum, C. Pl malariae, D. Pl ovale
A: Pl vivax
Answer: A: Pl vivax 
Explanation: The features are consistent with the diagnosis of Pl vivax .yellow brown pigment-vivax Dark brown pigment-falciparum Ref: D.R. Arora. Medical parasitology 4th ed pg. 77