How to retrieve Linked Defect Id from a Test in Test Set using OTA

I could able to retrieve Test information like whether it is passed or failed, execution date etc.,

Now I want to retrieve Linked Defect Id from that particular test in test set.

I am using below code to get status & Execution Date

Set TSTestFact = objTests.TSTestFactory
Set TestSetTestsList = TSTestFact.NewList("")

For Each objTestInst In TestSetTestsList
    strTestStatus = objTestInst.Status
    strExecDate = objTestInst.Field("TC_EXEC_DATE")
Next

Please provide sample code which can extract the defect id from a test in test set.