Multi select dropdown in Form Rules

Problem Statement: If we have three multi select dropdown values like A,B and C.

Rules Configured:

The first rule will work as expected but the second rule and the third will not work as expected.

Solution: If this is the use case then the following can be suggested as workaround:

1)Use string values instead of dropdown.

2)If multi select dropdown is only required then the dropdown should have all the combinations as dropdown values like the following: