Who is the incumbent that is listed with the candidates listed as marilyn lloyd (d) 57.4% harold w. coker (r) 42.6%?
create table table_1341577_43 (incumbent varchar, candidates varchar, PRIMARY KEY (incumbent))
select incumbent from table_1341577_43 where candidates = "marilyn lloyd (d) 57.4% harold w. coker (r) 42.6%"