Chinese letter configuration is seen in ?

Ans. is 'd' i.e. C diphtheriae C. diphtheriae is gram positive, non motile, nonsporing, noncapsulated. Babes Ernest or volutin granules Also known as metachromatic granules or polar bodies. Composed of polymetaphosphate. Usually stained with Loeffler's methylene blue. Special stains for demonstration are Albe's, Neisser 's and Ponder 's.