Which vehicles does this sign prohibit from overtaking?

A)All trucks with a M.A.M. of less than 3,500 kg.
B)All motor vehicles, including trucks.
C)Trucks with a M.A.M. of more than 3,500 kg.Correct
The sign indicates a prohibition for trucks whose maximum authorised mass exceeds 3,500 kilograms from overtaking motor vehicles travelling on the carriageway, even when such a manoeuvre does not involve encroaching on the area reserved for oncoming traffic. The prohibition applies from the point where the sign is located up to the next 'End of overtaking prohibition' or 'End of prohibitions' sign.