Quality Center test instances /test cases that are blocked and corresponding linked defects

One time or the other during the test execution phase, one comes across a question on how to find the test cases that are blocked by defect. This is key because

1. It helps to identify the defects that are blocking the test cases and highlight them to defect management teams

2. It helps to identify any defects that are closed recently and would have been inappropriately linked to a test case.