Solution

The correct answer is Both A and R are true but R is NOT the correct explanation of A

EXPLANATION:

• A validation check in software development ensures that the system is structured to meet the specified requirements and helps determine if the system meets the needs of the system users.
• The statement "Completeness checks system user-defined requirements," entails that a completeness check ensures all necessary parts of the system have been included and all requirements are fulfilled.
• Therefore, while both statements are true, Reason R does not directly explain Assertion A. They pertain to different aspects of system checks in software development. Validation is more about ensuring the system works as intended for the users, whereas completeness is about fulfilling all defined requirements, whether user-specific or functional.