Answer: Content validity
Explanation:
Content validity is defined as the process that indicates about content knowledge that a sample content should contain or was intended to have through measurement .
According to the question, students should question content validity of the test content .In this manner ,they can find the adequate content that should be present in test paper through measurement.
Other options are incorrect because face validity, construct validity and predictive validity does not define about knowledge domain that of any sample that test is measuring.Thus, the correct option is content validity.
