These signs, on a conventional road, indicate an immediate exit towards...
A)a dual carriageway.
B)a motorway.
C)another conventional road.Correct
The signs in the question indicate, on a conventional road, the directions reached by the immediate exit towards another conventional road. They also indicate the direction of the conventional road itself and its number.
When the immediate exit is towards a motorway or dual carriageway, the sign on the right will be blue in colour and not white.