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