Sometimes it is required to create a dropdown which should use base data as a variable rather than a binding.
1) Create a variable inside variables binding
2) Give variable name and create it of string type.
3) Select list binding type
4) Select second option from “Select List Binding Type”
5) Create a data mapping and use List Item configuration for default value of your dropdown.
please write to us if you have any problem in configuring it at firstname.lastname@example.org