What colours does the state flag of Bavaria have?

EDITORIAL LEARNING AID

Why is this answer correct?

The Bavarian state flag is white and blue, either striped or with the white and blue lozenges. Blue-white-red is the flag of Schleswig-Holstein, green-white-red that of North Rhine-Westphalia and black-yellow that of Baden-Württemberg.

White and blue and lozenges: Bavaria.

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