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
One of the following about corynebacterium diphtheriae is wrong - 
Select and explain. 
A. Gram negative, B. Ernest babes granules seen, C. Chinese letter pattern, D. Prevented by immunisation
A: Gram negative
Answer: A: Gram negative 
Explanation: None