Let's analyze the pronunciation of the underlined parts of each option provided:

1. **A. shot** - /oʊ/
**B. knot** - /oʊ/
**C. joke** - /oʊ/
**D. pot** - /ɑː/ or /ɔː/ (depending on the accent)

Here, the word **D. pot** has a different pronunciation sound compared to the others, which are pronounced like /oʊ/.

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2. **A. note** - /oʊ/
**B. close** - /oʊ/
**C. show** - /oʊ/
**D. blogger** - /ɔː/

The word **D. blogger** has a different pronunciation sound, which is closer to /ɔː/.

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3. **A. lock** - /ɑː/ or /ɒ/
**B. what** - /ɑː/
**C. bottle** - /ɑː/ (though it can depend on accent)
**D. store** - /ɔː/

Here, **D. store** has a different pronunciation from the others.

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4. **A. before** - /ɔː/
**B. lorry** - /ɔː/
**C. worry** - /ɔː/
**D. cordless** - /ɔː/

All words here are pronounced similarly, with no differently pronounced part identified.

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5. **A. warm** - /ɑː/
**B. worm** - /ɜː/
**C. quarter** - /ɑː/
**D. wharf** - /ɑː/

The word **B. worm** is pronounced differently compared to the other three.

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6. **A. bought** - /ɔː/
**B. enough** - /ʌf/
**C. tough** - /ʌf/
**D. come** - /ʌm/

The word **A. bought** has a distinct pronunciation from the others.

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7. **A. bowl** - /oʊ/
**B. bowing** - /oʊ/
**C. now** - /oʊ/
**D. row** - /oʊ/

All words are pronounced similarly.

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8. **A. boss** - /ɔː/
**B. cost** - /ɔː/
**C. lost** - /ɔː/
**D. host** - /ɔː/

Again, all words are pronounced similarly.

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Digging deeper, the consistently different words in each set include:
1. D. pot
2. D. blogger
3. D. store
4. None
5. B. worm
6. A. bought
7. None
8. None

This pattern makes it tricky since we only skews the majority towards the accented nature of the word. The differentiating pronounced terms usually demonstrate a diverse sound against vowel sounds presented in these words collections.

Overall, a more definitive answer would be more context and thus aligning towards selecting the isolated vowel sounds being truly well defined within dialect presentation of these examples.

Would you like me to analyze more specifically or would you have a different genre of questions in mind?