This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Microbiology
A male patient presented with granulomatous penile ulcer. On Wright geimsa stain tiny organisms of 2 microns within macrophages seen. What is the causative organism? 
Select and explain. 
A. LGV, B. Calymmatobacterium granulomatis, C. Neisseria, D. Staph aureus
B: Calymmatobacterium granulomatis
Answer: B: Calymmatobacterium granulomatis 
Explanation: Ans. is 'b' i.e., Calymmatobacterium granulomatosis Investigations Tissue smearMade from a piece of crushed ulcer tissueStained with Giemsa or Leishman stainOrganisms appear as intracellular (in macrophages) "bipolar inclusions" - safety pin or telephone handle appearance.