This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
Which of the following is eliminated by Hoffmann elimination? 
Select and explain. 
A. Althesin, B. D'Tubocurarine, C. Pancuronium, D. Atracurium
D: Atracurium
Answer: D: Atracurium 
Explanation: .