Exit Criteria may consist of :- i. Thoroughness measures , such as coverage of code, functionality or risk ii. Estimates of Defect density or reliability measures. iii. Residual risk such as defects not fixed or lack of test coverage in certain areas iv. Verifying the Test Environment.

Exit criteria include thoroughness measures like coverage of code, functionality, or risk (i) - this measures how completely testing was done. They also include estimates of defect density or reliability measures (ii). Residual risks such as unfixed defects or lack of test coverage (iii) are also part of exit criteria. Verifying the test environment (iv) is typically done during test planning, not as an exit criterion. Therefore options i, ii, and iii are correct.