With the B licence, can you drive a truck with a MAM of 3,500 kg towing a trailer of 750 kg?

With the B licence, can you drive a truck with a MAM of 3,500 kg towing a trailer of 750 kg?
A)Yes.Correct
B)No, because the total of the combination is 4,250 kg.
With the class B licence we can drive a vehicle of up to 3,500 kg MAM and, in addition, tow a trailer of up to 750 kg MAM, so we can drive a combination of vehicles whose MAM is 4,250 kg.

In addition, within the national territory, vehicles more than two years old without a trailer driven by alternative fuels intended for the transport of goods with a MAM exceeding 3,500 kg but not exceeding 4,250 kg may be driven, provided that the mass exceeding 3,500 kg comes exclusively from the excess mass of the propulsion system and provided that the load capacity is not increased compared to the same vehicle. (Alternative fuels: electricity, hydrogen, natural gas, liquefied petroleum gas (LPG), etc.)