In view of this sign, what distance must be maintained from the vehicle travelling ahead?

In view of this sign, what distance must be maintained from the vehicle travelling ahead?
A)A maximum of 70 metres.
B)A minimum of 70 metres, in any case.
C)A minimum of 70 metres, except when overtaking.Correct
The sign in the question prohibits travelling without maintaining a distance from the vehicle ahead equal to or greater than that indicated on the sign, except when overtaking.
If it appears without the indication in metres, it serves as a general reminder that the regulatory safety distance between vehicles must be observed.
SAFETY DISTANCE BETWEEN VEHICLES:
When travelling behind another vehicle, you must leave a space that allows you to stop, in the event of sudden braking, without colliding with it, taking into account the speed and the conditions of grip and braking. Furthermore, if you are travelling without signalling your intention to overtake, this distance must allow the vehicle behind you to overtake safely.
For these purposes, drivers of vehicles with a GVW of more than 3,500 kg and vehicles and vehicle combinations more than 10 metres in length must maintain a minimum separation of 50 metres.
It is sufficient to maintain a distance to avoid a collision (it is not necessary to maintain a distance to allow overtaking):
- In built-up areas.
- Where overtaking is prohibited.
- Where there is more than one lane in the same direction.
- When traffic is congested.
- When you intend to overtake.