To answer this question, you need to understand the concepts of different types of testing.
Option A) Regression Testing - This option is incorrect because regression testing is the process of retesting a software system after making modifications or bug fixes to ensure that the changes have not introduced new defects or caused any unexpected issues. It involves retesting a specific set of test cases, not executing the same test case multiple times.
Option B) ReTesting - This option is correct because retesting refers to the process of executing the same test case or set of test cases again to verify if a previously identified defect has been fixed. It involves repeating the test case that initially failed to check if the issue has been resolved.
Option C) Ad hoc Testing - This option is incorrect because ad hoc testing is an informal and unplanned testing approach where the tester randomly tests the application without any specific test cases or plan. It does not involve executing the same test case multiple times.
Option D) Sanity Testing - This option is incorrect because sanity testing is a brief and focused testing activity done to quickly determine if the software or a system is working as expected after making minor changes. It is usually performed before a major testing effort and does not involve executing the same test case multiple times.
The correct answer is B) ReTesting. This option is correct because retesting involves executing the same test case or set of test cases again to verify if a previously identified defect has been fixed.