Which of the following is a correct example of a value type allowed in a value set?

• A. A function
• B. An array as a top-level value
• C. A number, a string, true, false, or null
• D. A table name

Answer: (C)

Value sets are meant to list concrete constants that can be stored and compared directly. The allowed value types are primitive literals: numbers, strings, booleans (true/false), and null. These are simple, atomic values that can appear in a set and used in comparisons or assignments.

A function is executable code, not a literal value, so it doesn’t belong in a value set. An array as a top-level value is a composite data structure, not a single constant. A table name is an identifier for a database object, not a literal value you’d place in a value set.

Therefore, the correct idea is the collection of basic literal values: a number, a string, true, false, or null.