Which of the following is a DDL (Data Definition Language) command?

The correct answer is c) CREATE.

Explanation: DDL (Data Definition Language) commands are used to define and modify database structures. The CREATE command is used to create new tables, indexes, or databases. In contrast, SELECT, INSERT, and UPDATE are part of DML (Data Manipulation Language), which is used to retrieve and manipulate data within those structures. If you have more questions or need further clarification, feel free to ask!