This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: parasitology, Subject name: Microbiology
[{'content': 'Donovan bodies are seen in \nSelect and explain. \nA. Leishmania donovani, B. Klebsiella granulomatis, C. Legionella pnemophilia, D. Morexella catarrhalis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Klebsiella (formerly Calymmatobacterium) granulomatis, the causative agent of this hard, granulomatous, proliferating lesionHistologic demonstration of intracellular "Donovan bodies" in biopsy material most frequently suppos the clinical impression. Jawetz 27e pg: 761', 'role': 'assistant'}]