When the use of chains is mandatory, can they be replaced by some other authorised device?

When the use of chains is mandatory, can they be replaced by some other authorised device?
A)No.
B)Yes, by using a snow spray.
C)Yes, by winter tyres.Correct
When we are required to use chains we may continue driving if we have one of the following authorised devices installed:
- Snow chains.
- Other authorised devices, such as textile covers.
- Winter tyres (MS), special for snow and mud.
- Studded tyres, which must have rounded edges and not protrude from the surface by more than two millimetres.