Evaluate the following SQL statement:SQL> SELECT cust_id. cust_last_name FROM customersWHERE cust_credit_limit IN -(sele

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Evaluate the following SQL statement:SQL> SELECT cust_id. cust_last_name FROM customersWHERE cust_credit_limit IN -(select cust_credit_limitFROM customers -WHERE cust_city='Singapore'):Which statement is true regarding the above query if one of the values generated by the sub query is NULL?

A. It produces an error.
B. It executes but returns no rows.
C. It generates output for NULL as well as the other values produced by the sub query.
D. It ignores the NULL value and generates output for the other values produced by the sub query.