Which two HTML attributes must match to bind a datalist to its input?

• A. The name attribute and the value attribute
• B. The id attribute and the for attribute
• C. The list attribute and the id attribute
• D. The type attribute and the list attribute

Answer: (C)

Binding a datalist to an input relies on a direct reference between the two elements. The input carries a list attribute, and that attribute’s value must be the id of the datalist. This exact matching tells the browser which list of options to show as you type. The datalist’s id provides the unique identifier for that list, and the input’s list value points to it. When they match, the input will present the predefined options from that datalist as suggestions.

For example, the input might look like: and the datalist would be: . The name, value, or type attributes are unrelated to binding the datalist, and the for attribute is used with labels, not for linking datalists.