What are the three white grape varieties permitted in the northern Rhone?

The three white grape varieties permitted in the northern Rhône are Viognier, Roussanne, and Marsanne. These grapes are significant to the region's unique white wines, which are often known for their complexity and aromatic profile.

Viognier is renowned for its floral notes and stone fruit flavors, contributing to the distinctive profile of wines like Condrieu. Roussanne adds richness and acidity, often enhancing the longevity of the wine, while Marsanne typically brings body and structure, with flavors that can range from honeyed to herbal. Together, they create a harmonious blend that showcases the terroir of the northern Rhône, allowing for a range of styles from rich and full-bodied to more delicate and aromatic.

The other options present grape varieties that are either not grown in the northern Rhône or do not belong to the permitted list for white wines in that region. Understanding the correct varieties is crucial for identifying and appreciating the wines produced in this influential area of France.