Stored routines refers to stored functions and procedures.

True: Stored routines in MySQL include both stored functions and stored procedures. Stored functions are routines that return a single value and can be used in SQL statements like built-in functions. Stored procedures are routines that perform one or more SQL statements and can have input and output parameters. Both stored functions and stored procedures are stored in the database and can be invoked by client applications or other database objects.
False: This statement is incorrect. Stored routines in MySQL do indeed refer to both stored functions and stored procedures.
None of the mentioned: This option is not applicable. The correct statement is that stored routines encompass both stored functions and stored procedures.

Therefore, the correct statement is Option A: True.