Is it compulsory for a passenger car towing a trailer to carry a spare wheel for the trailer?

A)Yes, when the trailer is not a light trailer.
B)Yes.
C)No.Correct
When driving with a trailer, we are not required to carry a spare wheel for it, but we are required to carry a fire extinguisher.
In any case, whether driving with or without a trailer, we must always carry a hazard pre-warning device, a spare or temporary-use wheel (for the car) and the tools to change it, and a reflective vest.
The V-16 hazard pre-warning device is an autonomous, approved, amber-coloured luminous device with geolocation, powered by an independent power source (battery or accumulator). It must be placed on the highest part of the immobilised vehicle, ensuring maximum visibility. Currently, the V-16 is the only legal option for signalling an immobilised vehicle or an obstacle on the road, with pre-warning triangles now obsolete.
The V-16 hazard pre-warning device is an autonomous, approved, amber-coloured luminous device with geolocation, powered by an independent power source (battery or accumulator). It must be placed on the highest part of the immobilised vehicle, ensuring maximum visibility. Currently, the V-16 is the only legal option for signalling an immobilised vehicle or an obstacle on the road, with pre-warning triangles now obsolete.