Which coat of arms belongs to the federal state of North Rhine-Westphalia?

EDITORIAL LEARNING AID

Why is this answer correct?

The coat of arms of North Rhine-Westphalia shows, on a green field, the white Rhine as a wavy band, the white Westphalian horse and the red rose of Lippe; picture 2 shows this coat of arms. The other pictures show the coats of arms of other federal states and are wrong.

Rhine, horse and rose – the coat of arms of NRW.

This translation and explanation are editorial learning aids. The official German wording and answer key govern the examination.