Acetylcholine is secreted at the endings of the

A Preganglionic sympathetic fibres
B Preganglionic parasympathetic fibres
C Preganglionic sympathetic fibres to the adrenal medulla
D Preganglionic sympathetic fibres supplying the skin blood vessels
E All postganglionic parasympathic neurons

Correct Answer: Preganglionic sympathetic fibres, Preganglionic parasympathetic fibres, Preganglionic sympathetic fibres to the adrenal medulla, Preganglionic sympathetic fibres supplying the skin blood vessels, All postganglionic parasympathic neurons

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