Choose a word that has the underlined part pronounced differently from others

I. Choose a word that has the underlined part pronounced differently from others.
1. A. community B. collection C. certainly D. education
2.A.recycle          B.encourage         C.coupon         D.competiton
3.A.green          B.manager           C.graceful          D.telegram
4. A. game B. against C. gymnast D. great
5. A. school B. chemistry C. Christmas D. champion