Teacher Discussion Forums

Do ‘relation’ (singular) and ‘relations’ (plural) both work in the following sentences?
1. Out of D.S. Chambers and Michael Baxandall and some Italian scholars Robinson measures up Pound's ideas about the right relation/relations between artist and patron against what we know of how patronage in fact worked in the ducal fiefs of Renaissance Italy.
2. The relation/relations between archbishop and prime minister became at times very uneasy.
3. Any relation/relations between members of the same sex which allowed their difference, did not assimilate both to one fantasy, would be heterosexual.
4. It leads either to problems about the relation/relations between God and the world (for example, to a denial that it is His creation) or….
Thank you.

Why don't you just consult the original sentences? Or are they all test item gap-fills or something (if so, that would seem quite a difficult test!).

The original sentences had them all in singular (relation). I just wanted to know if they could be 'relations' as well. Please understand that I'm not testing anyone else. I'm an NNES and I'm testing myself.
Thank you.