This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Parasitology Pa 1 (Protozoology), Subject name: Microbiology
[{'content': 'In malaria, infective stage injected into human subjects by the mosquito is: \nSelect and explain. \nA. Sporozoite, B. Merozoite, C. Cryptozoite, D. Gametocyte', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Female anopheles mosquito: definitive host. Man: intermediate host. In malaria infective stage for humans is sporozoites.', 'role': 'assistant'}]