A) dopamine
B) adrenaline
C) acetylcholine
D) acetaldehyde
Correct Answer: C
Solution :
Acetylcholine is a common neurotransmitter present in the neuromuscular junctions, voluntary neural synapses. Cholinergic nerve fibres release it. It has excitatory effect to the skeletal muscles by depolarising it, causing a cascade that eventually results in muscle contraction.
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