Final answer:
The statement is false; there is no such concept as an ON NULL clause in standard SQL. A DEFAULT clause is used to specify a value for a column when no explicit value is provided.
Step-by-step explanation:
The statement that an ON NULL clause may be used in conjunction with a column's DEFAULT option is false. In most SQL database management systems, the DEFAULT clause specifies a value to be used for the column when no value is explicitly provided by the user during an insert operation. The concept of an ON NULL clause does not exist in standard SQL.
The ON NULL clause is not used in conjunction with a column's DEFAULT option. An incorrect assumption is made in the question. When creating a table in a database, the DEFAULT option can be used to specify a default value for a column when a new row is inserted without specifying a value for that column. The ON NULL clause is used with the ALTER TABLE statement to specify an action to perform when a NULL value is encountered in a column that does not allow NULL values.