This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, 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. Baonella bacilliformis, C. Plasmodium falciparum, D. Babesia microti', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * Baonella bacilliformis causes Oroya fever. The patient develops fever, severe headache and chills followed by severe anaemia due to the destruction of erythrocytes. * Plasmodium falciparum and babesia microti cause RBC destruction. * Clostridium produces tetanospasmin which blocks synaptic inhibition in the spinal cord which results in muscle rigidity and spasm. Ref: Baveja textbook of microbiology; 4th edition', 'role': 'assistant'}]