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: Unknown
Prolongd apnea may occur in patients with a genertically determined abnormal variant of cholinesterase following intravenous administration of 
Select and explain. 
A. Succinylcholine, B. Tubocurarine, C. Mivacurium, D. Succinylcholine or mivacurium
D: Succinylcholine or mivacurium
Answer: D: Succinylcholine or mivacurium 
Explanation: Both succinylcholine and mivacurium are completely and rapidly eliminated by plasma cholinesterase. Other nondepolarizing neuromuscular blockers, such as tu­bocurarine, pancuronium, and atracurium, are elimi­nated by renal or hepatic mechanisms or by spontane­ous hydrolysis (atracurium). Patients with genetically determined atypical cholinesterase may be detected by measuring the inhibition of cholinesterase by dibu­caine, a local anesthetic. Dibucaine inhibits the normal enzyme about 80%, but the abnormal variant is inhib­ited only 20%.