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
Which of the following have the capability to produce extra cellular polysaccharides 
Select and explain. 
A. Strep. mutans, B. Strep. pyogenes, C. Peptostreptococcus, D. Enterococcus
A: Strep. mutans
Answer: A: Strep. mutans 
Explanation: None