<prompt> Dtubocurarine acts byInhibiting nicotinic receptors at myoneural junctionInhibiting nicotinic receptors at autonomic ganglionProducing depolarizing blockBy inhibiting reuptake of acetylcholine  <response>: All non-depolarizing blockers D-tubocurarine act as competitive antagonist of acetylcholine on nicotinic Nm receptors at myoneural junction. 