Hyoscine is antagonist at which cholinergic receptor?

Hyoscine is antagonist at which
cholinergic receptor?
a) Muscarinic
b) Nicotinic
c) Both
d) None
Correct Answer - A
Ans. A. Muscarinic
Hyoscine (Scopolamine) acts by competitive antagonism of
acetylcholine at muscarinic receptors (Non-selective receptors).
It has little effect at nicotinic receptors.