Mark the letter A B C or D on your answer sheet to indicate the word whose underlined part differs from the other three in the position of first stress in each of the following questions

Mark the letter A, B, C or D on your answer sheet to indicate the word whose underlined part differs from the other three in the position of first stress in each of the following questions.
5.A.  hobby B.  invite C.  hotel D.  enjoy
6.A.  happy B.  boring C.  arrange D.  worker