Which of the following grape varieties is primarily used for Cognac production?

The primary grape variety used for Cognac production is Ugni Blanc. This grape is valued for its high acidity and ability to retain freshness, which is crucial in producing fine spirits like Cognac. Ugni Blanc is primarily used in the distillation process because it results in a distilled spirit that has clean, fruit-forward flavors, making it an ideal base for aging in French oak barrels.

Over time, the distillation and aging process allows the spirit to develop complexity, while the bright acidity from Ugni Blanc ensures that the final product is balanced and has potential for longevity in the bottle. Other grape varieties may be permitted in less common blends, but Ugni Blanc is the dominant and most widely recognized grape used, making it synonymous with high-quality Cognac production.