Which of the following drinks uses dry vermouth in the largest quantity?

In a Vodka Martini, the use of dry vermouth is typically more pronounced compared to other variations of martinis. While the classic Vodka Martini is primarily made with vodka, it traditionally includes a splash or a limited amount of dry vermouth to enhance the flavor profile. This drink is often served straight up in a chilled glass, with the vermouth's subtle herbal character complementing the clean and smooth taste of vodka.

The other options generally utilize either the same or lesser amounts of vermouth. For example, in a Dry Martini, the ratio favors vodka significantly, often leading to a perception of a drier taste due to minimal vermouth. The Gibson is also known for its dry nature, typically using gin instead of vodka, while maintaining a balance of vermouth but not significantly increasing its quantity. The Dirty Martini includes olive brine, which can overshadow the vermouth and alter the classic balance, usually resulting in even less vermouth being present compared to a standard Vodka Martini.

Thus, when considering all these factors, the Vodka Martini is recognized for having a larger quantity of dry vermouth included in its preparation compared to the other options presented.