The spelling of the word "Dulsine" is quite unique and can be explained using the International Phonetic Alphabet (IPA). The first syllable "dul" is pronounced as [dʌl], where the letter "u" is pronounced as a short "uh" sound. The second syllable "sine" is pronounced as [saɪn], where the letter "i" is pronounced as a long "ai" sound. Therefore, the correct spelling of this word is "Dulsine" with the stress on the first syllable.