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
[{'content': '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 \nSelect and explain. \nA. Pl vivax, B. Pl falciparum, C. Pl malariae, D. Pl ovale', 'role': 'user'}, {'content': 'Answer: A \nExplanation: 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', 'role': 'assistant'}]