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
Granuloma inguinale is caused by: 
Select and explain. 
A. Lymphogranuloma venereum, B. Treponema pallidum, C. Calymmatobacterium granulomatis, D. Hemophilus ducreyi
C: Calymmatobacterium granulomatis
Answer: C: Calymmatobacterium granulomatis 
Explanation: Granuloma inguinale  or Donovanosis is caused by Calymmatobacterium granulomatis.