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
All are true about enterohemorrhagic E.coli Except- 
Select and explain. 
A. Sereny test positive, B. May cause diarrhoea, C. Can cause hemolytic uremic syndrome, D. Verocytotoxin is produced
A: Sereny test positive
Answer: A: Sereny test positive 
Explanation: None