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.
Hello Itasan

I would say that these were the possibilities:

a) relations between A and B

b) relationship between A and B

c) relation of A to B

In your examples, I would use b).

But other posters may think differently!

Without a more complete context around these sentences, it would be difficult for me to defend one usage over the other.

Nevertheless, if these are test questions requiring a choice, I would answer:

1. relation
2. relations
3. relations
4. relation