<prompt> A 30 year old male presented with ulcerative lesion on glans penis. Wright- Giemsa stain showed 1-2 rounded structure in macrophage vacuoles. What is the etiologyChlamydia trachomatisN. gonorrhoeaH. ducreyiCalymatobacterium granulomatis  <response>: D i.e. Calymatobacterium granulomatis 