Choose the word whose underlined part is pronounced differently

Ex2. Choose the word whose underlined part is pronounced differently.
1. A. off B. of C. safe D. knife
2. A. talked B. laughed C. wicked D. kicked
3. A. mother B. love C. office D. one

Ex3. Choose the word whose stress pattern is different from the others
1. A. sociable B. volunteer C. photograph D. beautiful
2. A. orphanage B. delivery C. experiment D. directory