Which of the following is not recognized as a Noble grape of Alsace?

In Alsace, the Noble grapes are a select group known for their superior quality and suitability for the region's climate and soil. The Noble grapes recognized in Alsace include Riesling, Gewurztraminer, Muscat, and Pinot Gris. Riesling and Gewurztraminer are prominent examples of these Noble varieties, celebrated for their aromatic profiles and compatibility with the region's terroir.

Pinot Blanc is also an important grape in Alsace, though it is considered an important varietal rather than a Noble grape. It produces excellent-quality wines that can garner respect but does not hold the same classification as the Noble varieties.

Pinot Noir, while an important grape variety, particularly for red wine production, is not recognized as a Noble grape in Alsace. It does not possess the same historical acclaim or prominence as the Noble varieties that are highlighted in Alsace’s viticulture. Therefore, identifying Pinot Noir as the answer reflects an understanding of the classification system of grape varieties within the specific context of Alsace winemaking.