To determine which word's underlined part is pronounced differently from the others in each question, we need to look at the phonetic transcription of each word.
1. A. thin: θɪn
B. land: lænd
C. tradition: trəˈdɪʃən
D. thing: θɪŋ
Comparing the transcriptions, we see that "thin", "thing", and "land" all have different vowel sounds (ɪ, ɪ, and æ) and initial consonant sounds (θ, θ, and l), but "thin", "thing", and "land" have a clear commonality with "thin" and "thing" starting with the θ (theta) sound, and "land" with an open "a" sound. However, "tradition" stands out as having a completely different transcription. However, considering "thin" and "thing" have the theta sound (θ) which none of the other options have "land" has a more common letter combination with these words.
Answer: C. tradition
2. A. pink: pɪŋk
B. thank: θæŋk
C. bring: brɪŋ
D. longevity: lɔnˈʤɛvəti
Looking at the transcriptions, we see that "pink", "thank", and "bring" all end with a similar sound (-ɪŋk, -æŋk, and -ɪŋ), with "pink" and "bring" having the same vowel sound (ɪ), and "thank" having a distinct vowel sound (æ). Meanwhile, "longevity" has a completely different ending (-ɛvəti).
Answer: D. longevity
3. A. lantern: ˈlæntərn
B. invader: ɪnˈveɪdər
C. nation: ˈneɪʃən
D. race: reɪs
Comparing the transcriptions, we see that "lantern" and "nation" both have a distinct vowel sound (æ) in the first syllable. "Invader" and "nation" have a similar sound (eɪ) in the second syllable, but "invader" has a different vowel sound (ɪ) in the first syllable, and "race" has a distinct transcription (reɪs). However, looking at the sounds within the underlined part, we can see that the sounds in "lantern", "invader", and "nation" are distinct in the fact they contain sounds that aren't common among these options.
Answer: D. race
4. A. carrot: ˈkɛrət
B. city: ˈsɪti
C. cake: keɪk
D. class: klæs
Looking at the transcriptions, we see that "carrot" and "city" both have a distinct vowel sound (ɛ and ɪ) but looking at the other options we can see that "cake" and "class" contain sounds that are closer to the original sound.
Answer: B. city
5. A. age: eɪʤ
B. give: gɪv
C. garden: ˈgɑrdən
D. guitar: gɪˈtɑr
Comparing the transcriptions, we see that "give" and "guitar" both have a distinct vowel sound (ɪ), while "age" has a diphthong (eɪ), and "garden" has a distinct vowel sound (ɑ).