Create Form Task - dynamically populate Dropdown element with List<String>

[vishal]

I am unable to feed a List to dynamically populate a dropdown list in a Create Form Task Activity.Create Form Task.

I have created a String List called list.
And fed it into the Form Data Arguments for Create Form Task as an argument “list_dropdown”.
This is referenced in the dropdown element in the form designer to populate the options dynamically. But the values are never actually populated when the form reaches action center:

Please note that I have seen the following thread already but this solution only applied to create form.

Blockquote Forms activities: pass option values