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
[{'content': 'True about shigella dysentriae except - \nSelect and explain. \nA. It invades colonic mucosa, B. It can cause HUS, C. Produces verocytotoxin, D. Produces mildest form of dysentry', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Produces mildest form of dysentry * Mildest form of dysentry is caused by Sh. Sonnei.", 'role': 'assistant'}]