Answer:
(D). succinylcholine.
Step-by-step explanation:
Neuromuscular blocking agents are drugs block myoneural junctions (also known as neuromuscular junctions) by inhibiting neuromuscular transmission.
Succinylcholine or suxamethonium is an example of neuromuscular blocking agents, which is used as general anesthetic agent to induce short-term paralysis or muscle relaxation.
Thus, the correct answer is option (D).