For Greece Category B car theory, which statement about overtaking checks is correct?

1. Before overtaking on a two-way road, a driver must confirm legality, visibility, space, and no oncoming danger.
2. The safest answer about overtaking checks is to ignore the usual priority rule.
3. The correct response for overtaking checks is mainly to use the horn and continue.
4. This topic concerns only vehicle comfort and has no safety or legal effect.