Concept:The word whose stress falls on a different syllable from the others must be found.Explanation:The word "deter" has stress on the second syllable: /dɪˈtɜː/.The word "sailor" has stress on the first syllable: /ˈseɪ.lə/.The word "tailor" has stress on the first syllable: /ˈteɪ.lə/.The word "yoga" has stress on the first syllable: /ˈjəʊ.ɡə/.Only "deter" has a different stress pattern.Answer:A. deter