Here are the words whose underlined parts are pronounced differently from the others in each group:

13. A. **basic**
14. A. **separate**
15. C. **stretches**
16. A. **insect**
17. C. **agencies**
18. A. **crisis**
19. C. **serious**
20. A. **chart**
21. C. **rival**
22. B. **golden**
23. A. **clear**
24. A. **wrestling**
25. C. **ranked**
26. A. **childhood**
27. A. **culture**
28. A. **conflict**
29. A. **lighthouse**
30. B. **conducts**

These selections highlight differing pronunciations of the underlined parts among the given choices.