On this road, if you travel faster in the right-hand lane, is it considered overtaking?

On this road, if you travel faster in the right-hand lane, is it considered overtaking?
A)Yes, outside built-up areas it is considered overtaking, but not on urban roads.
B)Yes, it is considered overtaking both inside and outside built-up areas.
C)No, because in this case it is not considered overtaking.Correct
It is not considered overtaking when, on congested roads, vehicles travelling in one lane do so faster than those travelling in the adjacent lane, provided that the vehicles occupy the full width of the carriageway and can only travel at a speed that depends on the speed of the vehicle ahead of them in their lane.