Choose the word which has a different stress pattern from the others

PRONUNCIATION AND STRESS
Choose the word which has a different stress pattern from the others
nomadic
peaceful
different
generous
Choose the word which has a different sound in the CAPITAL part: sUitable - rUler - pollUtion - sUmmer
suitable
ruler
pollution
summer
Choose the word which has a different sound in the CAPITAL part: stoppED - askED - celebratED - walkED
stopped
asked
celebrated
walked
Choose the word which has a different stress pattern from the others
separation
activity
diversity
minority