Here are the words with the underlined part that differs in pronunciation for each question:

1. **C. teacher** (the 'ea' is pronounced as /iː/ while in the others it is /ɛ/)
2. **B. hear** (the 'ea' is pronounced as /ɪə/ while in the others it is /ɛə/)
3. **A. collect** (the 'c' sound is different, pronounced as /k/ while the others have the 'c' pronounced as /s/)
4. **D. enjoy** (the 'en' is pronounced differently than the other words which all demonstrate 'e' and 'a' pronounced as /ə/)
5. **C. picture** (the 't' in picture is pronounced distinctly compared to the others)
6. **B. adult** (the 'u' in this word can be pronounced as /ʌ/ while in the others it's typically /ʊ/)
7. **C. sick** (the 'i' is pronounced as /ɪ/ while the others have a /aɪ/ sound)
8. **D. decided** (the 'ci' is pronounced as /sɪ/ while the others end in /ɪd/)
9. **C. appointed** (the 'oi' is pronounced differently than others)
10. **C. jogged** (the 'g' in jogged is pronounced as /g/ whereas the others have the 'd' pronunciation)

Please note that while some pronunciations can be subjective and vary based on dialects, I have offered the most standard representations among English pronunciations.