<prompt> Causative organism of which STD has safety pin appearance-LGVChancroidSyphilisHerpesgenitalis  <response>: Ans. is b i.e., Chancroid o Causative organisms of two STDs have safety pin bipolar appearance:i Donovanosis or granuloma inguinale - Calymmatobacter granulomatosis.ii Chancroid - H ducreyi 