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: Dental
[{'content': 'Granuloma inguinale is caused by: \nSelect and explain. \nA. Lymphogranuloma venereum, B. Treponema pallidum, C. Calymmatobacterium granulomatis, D. Hemophilus ducreyi', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Granuloma inguinale\xa0 or Donovanosis is caused by Calymmatobacterium granulomatis.', 'role': 'assistant'}]