Mark the letter A, B, C or D to indicate the word that differs from the rest in the position of the main stress in the following questions

mark the letter A, B, C or D to indicate the word that differs from the rest in the position of the main stress in the following questions
1. A. physiology
B. economics
C. nominate
D. competition
2. A. symbol
B. tunic
C. prefer
D. label
3. A. remain
B. college
C. quality
D. scholar
4. A. contribution
B. appropriate
C. opportunity
D. anniversary
5. A. politics
B. imaginary
C. attraction
D. appearance