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 developed fasciculations when a muscle relaxant was administered for a surgery. Train of fasciculations is seen in: 
Select and explain. 
A. Mivacurium, B. Succinylcholine, C. Baclofen, D. Gallamine
B: Succinylcholine
Answer: B: Succinylcholine 
Explanation: The onset of paralysis by succinylcholine is usually signaled by visible motor unit contractions called fasciculations. These can be prevented by pretreatment with a small dose of nondepolarizing relaxant. Fasciculations are typically not observed in young children and elderly patients. Ref: Morgan, Jr. G.E., Mikhail M.S., Murray M.J. (2006). Chapter 9. Neuromuscular Blocking Agents. In G.E. Morgan, Jr., M.S. Mikhail, M.J. Murray (Eds), Clinical Anesthesiology, 4e.