Looking at each of those individually I'd say:
a) Could be City, could be Napoli, could be Celta Vigo, could be Coventry.
b) Could be City, could be Napoli, could be Celta Vigo, could be Coventry, could be Lazio.
c) Mancheter City. Never seen another club play in those colours.
For me, my first vote would be for c, my second vote would be a, and b I would accept if it meant no blue shorts, but white socks aren't Manchester City to me.
A & B Coventry?!? Really??? I've never seen coventry play in those colours. Napoli, Celta Vigo, Malmo... i'll give you... but there are loads of teams that play in all red like the Dippers... Aberdeen, Standard Liege etc, loads of teams that have worn the same colours as the rags... so what's you point? It doesn't matter if somebody else has that kit already it's all about giving ourselves an identity
The main thing is - as far as I can work out - City were the first to wear sky blue, so really that list of teams you put down all look like us, not vice versa!