This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: S.T.D., Subject name: Skin
Donovanosis is caused by: 
Select and explain. 
A. H. ducreyi, B. T. pertenue, C. Calymmatobacterium granulomatis, D. Chlamydia trachomatis
C: Calymmatobacterium granulomatis
Answer: C: Calymmatobacterium granulomatis 
Explanation: Ans. c. Calymmatobacterium granulomatisCalymmatobacterium granulomatis is how known as Klebsiella granulomatis (gram negative, red shaped bacterium)