This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Chinese letter configuration is seen in ? 
Select and explain. 
A. Cl tetani, B. Cl perfringens, C. Strept salivarius, D. C diphtheriae
D: C diphtheriae
Answer: D: C diphtheriae 
Explanation: 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.