Which of the following is NOT represented by ASCII?

ASCII, which stands for American Standard Code for Information Interchange, is a character encoding standard primarily used for representing text in computers and other devices that use text. It includes a set of 128 characters that encompass the English alphabet (both uppercase and lowercase letters), numerical digits (0-9), various punctuation marks, and control characters.

The standard ASCII set does not include custom emojis or graphical representations because it was designed for basic text characters only. Emojis often use more complex encoding systems like UTF-8, which can represent a much larger set of characters outside the original range of ASCII. Thus, the correct answer highlights an option that falls outside the scope of what ASCII is designed to represent.