Slicer Filtering with URL query string parameter

Thanks for looking into this and  I did manage to solve the problem on my own through a series of trial and error.

What must not be done

a. No slicer shoule be made to Single select (for the  reason explained above )

What needs to be done

Option 1 - create vertical list on the slicer settings (visual -> slicer settings-> options-> style) and don't select any values. When URL query string is supplied with a parameter, it will filter the data model correctly but the end user will see that particular slicer value (the one/s passed on to URL query string) slicer value as unselected (as visible here ) in the slicer viz.

Option 2 - create vertical list on the slicers (visual -> slicer settings-> options-> style) and select all values. When URL query string is supplied with a parameter, it will filter the data model  correctly and the end user will see that particular slicer value  (the one/s passed on to URL query string) as selected in the slicer viz