What do you understand by indirect-acting cholinomimetic agent?

pharmacy

The mechanism of action of indirect-acting cholinomimetic agents is:

a) Binding to and activation of muscarinic or nicotinic receptors

b) Inhibition of the hydrolysis of endogenous acetylcholine

c) Stimulation of the action of acetylcholinesterase

d) Releasing acetylcholine from storage sites