Find the word which has different sound in the part underlined

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

1

A. nothing

B. gather

C. theatre

D. death

2

A. something

B. brother

C. them

D. weather

3

A. those

B. there

C. thank

D. without

4

A. healthy

B. northern

C. thirsty

D. mouth