Find the word which is different from the other in the position of primary stress

Find the word which is different from the other in the position of primary stress. 1. A. unbelievable B. competition C. bread winner D. generation 2. A. tradition B. imagine C. attendant D. fatal 3. A. survive B. custom C. access D. violence 4. A. seniority B. unbelievable C. access D. generation 5. A. wealthy B. marriage C. fatal D. seniority 6. A. survive B. attendant C. violence D. imagine               
MN giúp mình với ạ, mình bị yếu khúc phát âm =(