I want to know the answer to the following question:
Serbo-Croatian is the only Slavic language to use what two scripts together?
All the background I'm provided with is that "The Croatian Latin alphabet (Gajica) followed suit shortly afterwards, when Ljudevit Gaj defined it as standard Latin with five extra letters that had diacritics, apparently borrowing much from Czech, but also from Polish, and inventing the unique digraphs "lj", "nj" and "dž".". Is that enough to answer the question?