The spelling of the word "Rasia" can be phonetically transcribed as /reɪʒiə/. The first syllable "ra" is pronounced as in the word "ray", while the second syllable "si" is pronounced as in the word "measure". The final syllable "a" is pronounced as in the word "area". The letter "z" is pronounced as the voiced fricative sound /ʒ/, which is similar to the "g" sound in the word "garage". Therefore, the correct spelling of the word "Rasia" accurately represents its pronunciation.