Here are the answers with the words that have underlined parts pronounced differently:

1. C. thus (the "th" sound is pronounced differently from the others)
2. A. discussion (the "s" is pronounced differently)
3. D. raise (the "ai" sound is pronounced differently)
4. A. mute (the "u" sound is pronounced differently)
5. A. who (the "wh" sound is pronounced differently)
6. B. tent (the "te" sound is pronounced differently)
7. D. block (the "o" sound is pronounced differently)
8. A. talked (the "ed" ending is pronounced differently)
9. B. climb (the "b" is silent)
10. C. dumb (the "b" is silent)

If you need more clarification or examples, feel free to ask!