Here are the correct answers based on the position of primary stress:

1. **B. access** (The stress is on the second syllable, while the others have stress on the first.)
2. **C. paradise** (The stress is on the second syllable, while the others have stress on the first.)
3. **A. biology** (The stress is on the second syllable, while the others have stress on the first.)
4. **B. enter** (The stress is on the first syllable, while the others have stress on the second.)
5. **B. touristy** (The stress is on the first syllable, while the others have stress on the second.)

So the answers are: 1-B, 2-C, 3-A, 4-B, 5-B.