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
Laudanosine is metabolite of- 
Select and explain. 
A. Cisatracurium, B. Atracurium, C. Pancuronium, D. Gallamine
B: Atracurium
Answer: B: Atracurium 
Explanation: Atracurium besilate, also known as atracurium besylate, is a medication used in addition to other medications to provide skeletal muscle relaxation during surgery or mechanical ventilation