This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
The only Species of Shigella that produces exotoxin 
Select and explain. 
A. Shigella sonnei, B. Shigella flexneri, C. Shigella boydii, D. Shigella dysenteriae
D: Shigella dysenteriae
Answer: D: Shigella dysenteriae 
Explanation: .