Name the segments that are skew to gc ef, dh, fh, ab bd, ab, ef, fh bd, ef, ac, fh fh, ea, ab, ef

We know that
 skew lines are two lines that do not intersect and are not parallel

therefore

case a) EF, DH, FH, AB
is not the solution, because DH is parallel to GC

case b) BD, AB, EF, FH 
is the solution, because the four lines, do not intersect and are not parallel to GC

case c) BD, EF, AC, FH 
is not the solution, because AC intersect to GC

case d) FH, EA, AB, EF 
is not the solution, because EA is parallel to GC

the answer is the option
BD, AB, EF, FH