The developer noticed that the block of code he had written to fetch the transaction details of the user's credit card info into the user interface for processing is vulnerable to unauthorized access.

He identified by using the DBMS$\_$ASSER package, he can prevent SQL injection. Choose the correct options which will help him to meet the requirements.

Input string length should be limited

Verify qualified SQL names

Validated the existing schema name

Validate the TNS connect string