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: Microbiology
[{'content': 'In plasmodium falciparum infection, the number of cycles in which the parasite undergoes in the liver is: \nSelect and explain. \nA. 0, B. 1, C. 2, D. 3', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Sexual cycle of falciparum consists of gametogony (production of gametes) in humans and sporogony (production of sporozoites) in mosquitoes; asexual cycle (schizogony) occurs in humans. Sporozoites in saliva of female Anopheles mosquito enter the human bloodstream and rapidly invade hepatocytes (exoerythrocytic phase). There they multiply and form merozoites (Plasmodium vivax and Plasmodium ovale also form hypnozoites, a latent form). Merozoites leave the hepatocytes and infect red cells (erythrocytic phase). There they form schizonts that release more merozoites, which infect other red cells in a synchronous pattern (3 days for Plasmodium malariae; 2 days for the others). Ref: Levinson W. (2012). Pa IX. Brief Summaries of Medically Impoant Organisms. In W. Levinson (Ed), Review of Medical Microbiology & Immunology, 12e.', 'role': 'assistant'}]