This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Infectious Disease, Subject name: Pathology
[{'content': 'A 34-year-old lady presents with high grade fever with chills and rigors. On examination a firm spleen is felt 3 cm below costal margin with right upper quadrant tenderness. Peripheral smear was prepared. Diagnosis is? \nSelect and explain. \nA. Plasmodium vivax, B. Plasmodium falciparum, C. Amoebic liver abscess, D. Infectious mononucleosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (b) Plasmodium falciparum.* Notice the rings inside RBC\'s with delicate cytoplasm and one or two small chromatin dots.* The RBC\'s that are infected are not enlarged and there is multiple infection of RBC which is diagnostic of P. falciparum infection.* Occasional applique forms (rings appearing on the periphery of the RBC) can he present.* P. falciparum gametocytes are crescent or sausage shaped (See middle of image). The chromatin is in a single Mass (macrogamete) or diffuse (microgamete)Image source - style="font-family: Times New Roman, Times, serif">', 'role': 'assistant'}]