Which vehicle will have priority at this roundabout?

Which vehicle will have priority at this roundabout?
A)The red vehicle.Correct
B)The blue vehicle.
When there is no signage regulating right of way, the driver is obliged to yield to vehicles approaching from the right, except in the following cases:
- Vehicles travelling on a paved road have priority over those coming from an unpaved one.
- Vehicles travelling on rails have right of way over other users.
- At roundabouts, those already on the circular road have priority over those wishing to enter.
- Vehicles travelling on a motorway have priority over those wishing to enter it.