The left lane is open in the direction opposite to the usual one; at what maximum speed may vehicles travelling in the right lane drive?

A)At the maximum speed of the road, 120 km/h.
B)At 60 km/h.
C)At 80 km/h.Correct
Users driving in a lane enabled in the direction opposite to the usual one shall drive at least with low-beam or dipped lights on, both day and night, at a maximum speed of 80 km/h and a minimum of 60, or lower if so established or signposted, and may not move laterally invading the lane or lanes intended for the normal direction of traffic, even to overtake.
Drivers of vehicles travelling in lanes intended for the normal direction of traffic, adjacent to the lane enabled for traffic in the direction opposite to the usual one, may also not move laterally invading those enabled to be used in the direction opposite to the usual one. They shall keep at least the low-beam or dipped lights on, both day and night, and additionally, if they have only one lane in their direction, they shall drive at a maximum speed of 80 km/h and a minimum of 60, or lower if so established or signposted.
Drivers of vehicles travelling in lanes intended for the normal direction of traffic, adjacent to the lane enabled for traffic in the direction opposite to the usual one, may also not move laterally invading those enabled to be used in the direction opposite to the usual one. They shall keep at least the low-beam or dipped lights on, both day and night, and additionally, if they have only one lane in their direction, they shall drive at a maximum speed of 80 km/h and a minimum of 60, or lower if so established or signposted.