Using Indirect for Data Validation List

[wildio]

I have two workbooks: in workbookA I have two lists which I created a name range for (list1 and list2), in workbookB is where I want to create my drop down list. In workbookB cell A2 I have a Y, in cell B2 I wanted to create a drop down list where if cell A2 has a Y the drop down list will show list1 from workbookA and if it's an N, it will show list2 from workbookA. I've done this before using indirect in data validation, but, my lists were in the same workbook. I hope I'm being clear in my explanation.

 

[wildio]

Thank you for the views, I think I found a way that works for me. Instead of creating a named range in workbookA for my two lists and then referring to it in workbookB. I just simply created a name range in workbookB (Name: U, Refers to: list1.xlsx!W3:W7). Then applied the data validation (Allow: List, Source: INDIRECT(A2)) in cell B2.