What are the colours of the state flag of Rhineland-Palatinate?

EDITORIAL LEARNING AID

Why is this answer correct?

The state flag of Rhineland-Palatinate is black-red-gold and bears the state coat of arms in the upper corner. White-red is the flag of Hesse, black-yellow the flag of Baden-Württemberg and green-white-red the flag of North Rhine-Westphalia.

Black-red-gold with the coat of arms – Rhineland-Palatinate.

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