Visa A: Airport Transit Visa allowing the holder to travel through or transit the international zone of a Schengen country without entering the Schengen Area as such.
A Schengen transit visa is compulsory for those travelling from one of the non-Schengen states to any other non-Schengen state with a changeover of flights in a Schengen country.
Visa C: Short Stay Visa allowing the holder to stay in Schengen Area for a specific period of time, based on the validity of the visa.
There are three categories under this visa:
· Single-entry visa,
· Double-entry visa
· Multiple-entry visa