This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anesthesia, Subject name: Pharmacology
The drug inactivated in plasma by spontaneous non enzymatic degradation is: 
Select and explain. 
A. Atracurium, B. Vecuronium, C. pipecuronium, D. Pancuronium
A: Atracurium
Answer: A: Atracurium 
Explanation: Atracurium in plasma undergoes spontaneous non enzymatic degradation(Hoffman elimination)in addition to that by cholinesterases. All other given drugs don't undergo Hoffman elimination. From Tripati 7th edition Page no 353