To produce a stored function, which statement is used?

Answer: Option B

This question asks about creating a stored function in MySQL. Stored functions are like mini-programs that you can save and reuse within your database.

Out of the given options, only CREATE FUNCTION is used to create stored functions.

The other options are incorrect. CREATE PROCEDURE is used to create stored procedures, which are similar to functions but are designed for more complex tasks that can modify data. The terms PRODUCE FUNCTION and PRODUCE PROCEDURE are not valid MySQL commands.

So the answer is Option B: CREATE FUNCTION.