Looking at the diagram, is it mandatory to overtake the tram on the right?

Looking at the diagram, is it mandatory to overtake the tram on the right?
A)No, it can be overtaken on the right or on the left.
B)No, it must be overtaken on the left.
C)Yes, in all cases.Correct
As a general rule, overtaking must be done on the left. Exceptionally, overtaking on the right is permitted:
- When the driver of the vehicle to be overtaken is clearly indicating their intention to change direction to the left or to stop on that side, provided there is space to do so safely. (Photo 1)
- On roads with traffic in both directions, when overtaking trams travelling along the central area. (Photo in the question)
- Within built-up areas, on carriageways that have at least two lanes reserved for traffic in the same direction of travel, delimited by longitudinal markings. (Photo 2)