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: Anaesthesia
A Patient has hypersensitivity to neostigmine. He has to undergo upper abdominal surgery. Muscle relaxant of choice is: 
Select and explain. 
A. Pancuronium, B. Ropacuronium, C. Vecuronium, D. Atracurium
D: Atracurium
Answer: D: Atracurium 
Explanation: Ans. D. AtracuriumAtracurium undergo spontaneous degradation in plasma called as Hoffman degradation.Atracurium is relaxant of choice if reversal agent is contraindicated.Other muscle relaxants:(mentioned in question) require reversal with neostigmine (but Ne can not use neostigmine due to hypersensitivity), so can not use in this patient