<prompt> The fall in blood pressure caused by d-tubocurarine is due to:Reduced venous returnGanglionic blockadeHistamine releaseAll of the above  <response>: d-tubocurarine :- - is a competitive NM blocker. It produces fall in BP due to:- - causes Blockade of sympathetic ganglia. - causes Histamine release. - Reduced venous return as a result of paralysis of limb and respiratory muscles. 