These signs mean...

These signs mean...
A)immediate exit towards a conventional road and direction of travel on a motorway or dual carriageway.
B)advance direction sign on a conventional road towards a motorway or dual carriageway.
C)advance direction sign on a motorway or dual carriageway towards any road and direction of travel.Correct
The signs in the question indicate, on the carriageway of a motorway or dual carriageway, the directions of the slip road for the next exit, the distance to it and the junction number. They also indicate the direction of travel on the motorway or dual carriageway.
Answer b) is incorrect because immediate exit signs do not contain metres, so it does not correspond to the image shown.
Advance direction signs, when they contain a pictogram, indicate that we are travelling on a motorway or dual carriageway, so answer c) would also be incorrect.
Below we have the first image where we are travelling on a conventional road with an immediate exit towards a conventional road.
In the second image we are travelling on a conventional road and the advance sign indicates a direction towards a motorway or dual carriageway.