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: Pathology
Enzymes which are responsible for the synthesis of extracellular glucans and fructans: 
Select and explain. 
A. Glucosyltransferase, fructosyl transferase., B. Glucosylconvertase, fructosyl, C. Convertase., D. Both of the above.
A: Glucosyltransferase, fructosyl transferase.
Answer: A: Glucosyltransferase, fructosyl transferase. 
Explanation: None