Taxes on UNJSPF payments made to US citizens living abroad.

Hi. I'm happy to be getting monthly pension payments from the UN Joint Staff Pension Fund (UNJSPF), but I'm confused about my taxes. I'm a US citizen but live in Denmark. As a Danish resident, I'm obligated to pay taxes to Denmark on my worldwide income, including from the UN pension fund.

 

Since the US and Denmark have a tax treaty, I understand I can take a Foreign Tax Credit using Form 1116 on my US taxes. Yes?

 

If so, what category of income do I use: (a) income re-sourced by treaty, (b) passive category income, (c) general category income, or something else? Thanks for your help.