Identify the testing which cannot be performed on the first build of the software?(1 Point)Sanity Testing Regression Testing RetestingAll a, b and c

The testing that cannot be performed on the first build of the software is Regression Testing.

Here's why:

1. Sanity Testing: This is a type of software testing that is performed after receiving a software build, with minor changes in code, or functionality, to ascertain that the bugs have been fixed and no further issues are introduced due to these changes. The goal is to determine that the proposed functionality works roughly as expected. This can be performed on the first build.

2. Regression Testing: This is a type of software testing that verifies that software, which was previously developed and tested, still performs correctly after it was changed or interfaced with other software. Since there are no previous builds in the first build, there are no changes or interfaces to test against, making regression testing impossible.

3. Retesting: This is a type of testing that is done to make sure that the tests cases which failed in the final execution are passing after the defects against those failures are fixed. This can be performed on the first build.

So, the answer is Regression Testing.