Which of the following is NOT a grape variety used in the production of Topaque?

Topaque, also known as Tokay, is a fortified wine primarily produced in Australia, notably in the Rutherglen region. The traditional grape varieties used in the production of Topaque include Muscadelle, which is the main grape used, as well as others like Chardonnay and Viognier, which can contribute to the flavor profile of the wine.

Shiraz, while an important grape variety in many Australian wine productions, does not have a role in the traditional production of Topaque. Topaque is specifically characterized by its sweet, rich flavors, which are more commonly derived from the other varieties mentioned, whereas Shiraz is typically associated with dry red wines.

Understanding the types of grapes used in making different wine styles is crucial for a sommelier, as it aids in knowledge about flavor profiles and pairing recommendations. The distinction between the grape varieties enables a deeper appreciation of regional wine styles and their respective characteristics.