Which of the following is NOT a style of tequila?

Tequila is classified into several styles based on the aging process and flavor profile. The correct choice identifies a term that does not correspond to an official category of tequila.

Mixto refers to tequila that is made with a minimum of 51% blue agave, and it may contain other sugars. Blanco, also known as silver tequila, is unaged and bottled immediately after distillation, showcasing the pure agave flavor. Extra Anejo is a relatively recent classification that describes tequila aged for more than three years, often resulting in a richer, more complex flavor.

On the other hand, "Reserve" is not an officially recognized style of tequila. While some brands may use the term "reserve" to market their products or suggest a higher quality or special aging, it is not a standard category established by Mexican regulations governing tequila production. Thus, this term does not fit within the established classifications of tequila.