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 drug undergoes Hoffman's elimination 
Select and explain. 
A. Atracurium, B. Pancuronium, C. Mivacurium, D. Vecuronium
A: Atracurium
Answer: A: Atracurium 
Explanation: Atracurium undergoes Hoffman's elimination that is nonenzymatic spontaneous degradation and hence safe in patients with renal and hepatic insufficiency.