what documents to use for english language requirement

[shahid2000]

I have been reading various posts on the forum but I am very confused now. Can someone please help me. Here is my situation.

Applying for naturalization as a spouse of a british citizen.
I have a foreign masters degree from a non-english speaking country but the degree was taught in English.
I have a certificate from the university which says that the degree was taught in english. The degree is also recognized on the PBS calculator.

1. What documents do I need to fulfill english requirement for naturalization?
2. Is my original degree & english certificate from the university enough or Do I need to get something from NARIC?

Some posts seem to suggest I need a certificate from NARIC. When I check NARIC website they are providing two certifactes:
Statement of Comparability
English Language Assessment

3.Which one do I need? Or do I need to obtain Both?