Whaat is difference between key and parent key in enumeration?

[AnushkaGupta]

Hello @Parul.mogha, Please refer to this post.

How to create a parent-children relationship in Enumerations and Dropdowns?

I want to display the selected value for one of my dropdown menus based on the choice made by the user in the first dropdown menu.

This post thoroughly describes the ParentElement Key role in an enumeration.