Which vehicle will have right-of-way?

A)The grey vehicle.Correct
B)The blue vehicle.
A solid transverse marking, by itself, does not oblige the vehicle that comes upon it to stop. It serves to indicate the place to stop in the event that it is mandatory to do so.
Therefore, in this case, priority will be the result of applying the general rule of priority to the right, and the grey vehicle will have right-of-way.