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': 'Acute intravascular hemolysis can be caused by infection due to all of the following organisms except- \nSelect and explain. \nA. Clostridium tetani, B. Bartonella bacilliformis, C. Plasmodium falciparum, D. Babesia microti', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Organisms that parasitize RBCs can directly lyse them and can cause intravascular hemolysis.\nIntracellular parasites; reside within RBCs: Plasmodium spp., Babesia spp., Bartonella baciliformis\nClostridium tetani is not intracellular parasite; it can cause hemolysis indirectly by production of tetanolysin toxin, but\xa0it not intravascular hemolysis.', 'role': 'assistant'}]