Which of the following statements is true regarding Italic numerals?

The statement that some numerals can drop below the baseline is accurate when discussing Italic numerals. In traditional calligraphy, particularly in the Italic style, certain numerals, such as the lowercase 'g' or descenders in letters, can extend below the baseline. This characteristic enhances the fluidity and rhythm of the type, allowing it to maintain harmony with the slanted forms of the letters used in Italic scripts.

In contrast, the other statements do not align with the characteristics of Italic numeral design. Numerals in this style are not uniform in height, meaning they exhibit variation; they do not remain upright and can indeed reflect the inherent slant that characterizes Italic writing. Additionally, contrary to the suggestion that Italic numerals are never slanted, they possess the same angled quality as other letters in the Italic script, contributing to the overall aesthetic of the writing style. Finally, saying that Italic numerals are not used in formal writing is misleading; they can be used effectively in various formal contexts, particularly in design, typography, and calligraphy where elegance and style are valued.