Choose the word whose underlined part is pronounced differently from that of the others

Ex1. Choose the word whose underlined part is pronounced differently from that of the
others.
1. A. precious B. preparation C. pretty D. repetition
2. A. architect B. mechanic C. choir D. parachute
3. A.practice B. cracker C. bracelet D. tractor
Ex2. Choose the word whose main stress pattern is placed differently from the others.
1. A. prediction B. compulsory C. intelligent D. judgement
2. A. abroad B. visit C. travel D. happen