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
[{'content': 'Enzymes which are responsible for the synthesis of extracellular glucans and fructans: \nSelect and explain. \nA. Glucosyltransferase, fructosyl transferase., B. Glucosylconvertase, fructosyl, C. Convertase., D. Both of the above.', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]