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
True about shigella dysentriae except - 
Select and explain. 
A. It invades colonic mucosa, B. It can cause HUS, C. Produces verocytotoxin, D. Produces mildest form of dysentry
D: Produces mildest form of dysentry
Answer: D: Produces mildest form of dysentry 
Explanation: Ans. is 'd' i.e., Produces mildest form of dysentry * Mildest form of dysentry is caused by Sh. Sonnei.