Choose the word which main stressed syllable is placed differently from that of the other in each group

Choose the word which main stressed syllable is placed differently from that of the other in each group. 1.
Multiple choice 1 Question 2
generation
presentation
necessity
obligation
2.
Multiple choice 2 Question 2
resident
cutlery
ancestor
permission
3.
Multiple choice 3 Question 2
custom
explain
chopstick
manner
4.
Multiple choice 4 Question 2
pagoda
complement
society
tradition