Find the word which has a different sound in the part underlined

Find the word which has a different sound in the part underlined.
1. A. school B. food C. foot D. fool
2. A. staple B. maintain C. stay D. habit
3. A. spoon B. took C. could D. wood
4. A. dogsled B. nomadic C. online D. offline
5. A. wood B. look C. shook D. poor
6. A. catch B. cattle C. harvest D. paddy
7. A. picturesque B. herd C. ferry D. stretch
8. A. drink B. income C. pink D. inside
9. A. milk B. lighthouse C. kite D. nice
10. A. school B. ache C. chair D. chorus
11. A. tour B. sour C. tourist D. sure
12. A. carp B. martial C. marvelous D. careful
13. A. coin B. noisy C. soil D. tortoise
14. A. pagoda B. drop C. offering D. bonding
15. A. cellphone B. cool C. caught D. cup