The direction of synthesis of DNA is from the 5' end to the 3' end on both strands. from the 3' end to the 5' end on both strands.

The direction of synthesis of DNA is

1.  from the 5' end to the 3' end on both strands.
2.  from the 3' end to the 5' end on both strands.
3.  from the 5' end to the 3' end on one strand and from the 3' end to the 5' end on the other strand.
4.  none of the above.