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: Pharmacology
Which of the following can cause lactic acidosis ? 
Select and explain. 
A. Biguanides, B. Glibenclamide, C. Tolbutamide, D. Chlorpropamide
A: Biguanides
Answer: A: Biguanides 
Explanation: None