I have no idea what this question is asking. But there were four members of the Swedish group ABBA, five if you count Sig Anderson, considered by some to be the fifth member of ABBA, since he co-wrote many songs with Benny and Bjorn.
Being that there is no song title, and the only clue to the title for which you are searching is the word "of," and there being no ABBA songs that are titled simply "Of," a song by song search is the only option to provide an answer. There are seven songs that contain the word of. These are below with those who performed them:
8years
Because they can. How lucky we are that they do.
No?
1974
no it is not
Nop abba did
Abba Abba has 128 pages.
Abba,Arrival, The Album, Voulez Vous,Super Trouper, The Visitors ,Gracias Por La Musica
Yes. They sang Waterloo.
Under attack of what?
which song do you mean
they sang Money money money in 1976 (from the album arrival)