Which of these is a small red wine only appellation on the right bank of the Northern Rhone?

Cornas is recognized as a small red wine appéllation located on the right bank of the Northern Rhône. This appellation is known for its production of robust, full-bodied Syrah wines that thrive in its steep, granite-soil vineyards. Cornas has a long history and is one of the most important areas for red wine in the Northern Rhône region.

The unique geographical and climatic conditions of Cornas contribute to the distinct characteristics of its wines, making them rich in flavor and full of depth. The vineyards are primarily focused on the Syrah grape, which is cultivated without the use of any white grape blending, as seen in some other Rhône appellations. As a result, Cornas wines are known for their intensity and aging potential.

In contrast, the other options include appellations with different characteristics or are larger in production. For instance, Côte Rôtie and Crozes-Hermitage produce both red and white wines, while Saint-Joseph covers a larger area and produces a wider variety of styles. This makes Cornas distinct in its production focus and scale.