Certainly, here are the answers:

Question 1: C. exercise Question 2: C. potential Question 3: D. graduate Question 4: B. graduate

In each of these words, the stressed syllable differs from the others:

1. exercise (primary stress on the second syllable)
2. develop (primary stress on the second syllable)
3. potential (primary stress on the third syllable)
4. engineer (primary stress on the second syllable)
5. graduate (primary stress on the first syllable)