Choose the word (A, B, C or D) whose underlined part is pronounced differently from the others

I. Choose the word (A, B, C or D) whose underlined part is pronounced differently from the others
1. A. count B. found C. could D. sound
2. A. happens B. rains C. cancels D. stops
3. A. surround B. course C. mountain D. house
4. A. although B. whether C. ethnic D. clothing
5. A. books B. exams C. texts D. stops
6. A. Malaysia B. media C. majority D. occasion
(Giải thích giúp mình thì càng tốt nha)