Display All Records When User selects All in Select menu

Hi All,

I have a paged query that I am filtering based on values in 3 Select Dropdowns.
Based on the Value of SELECT 1, SELECT 2 displays different options. This works perfectly.
I added another filtering option SELECT 3. This also works.
My issue is I want an option in SELECT 3 which displays all results based SELECT 2. Something like Display records without considering What is in SELECT 3. How do I make this work. @Teodor

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