Don't you mean exclave? An enclave is completely surrounded by one country or state or whatever you're describing, but an exclave is a part of a country separated from the mainland part (or just main part, as in the case of East Timor) of the country or state etc.....
Saudi-Bahraini Border is a bridge border. As for the enclave-exclave, thanks for letting me know, that was a vocabulary mistake. I'll have to fix this quiz to include Turkey-Azerbaijan anyway
https://garfors.com/the-worlds-11-shortest-land-borders-html/
It didn't list Azerbaijan for some reason. Maybe they recognize Nakhchivan as part of Armenia? But I'll add it.