The spelling of the word "Supriana" can be explained through its International Phonetic Alphabet (IPA) transcription. The first syllable is pronounced as "su," which is represented as /su/ in IPA. The second syllable is pronounced as "pre," represented as /preɪ/. The third syllable is pronounced as "an," represented as /æn/. The final syllable is pronounced as "a," represented as /ə/. Therefore, the correct spelling of the word "Supriana" accurately represents its phonetic sounds.