Here are the answers to your questions based on the given choices:

**I. Choose the letter (A, B, C or D) to indicate the word whose underlined part differs from the other three in pronunciation:**

1. **C. played** (the "a" in "played" is pronounced differently from the others)
2. **D. occurred** (the "u" in "occurred" is pronounced differently from the others)
3. **C. ended** (the "e" in "ended" is pronounced differently from the others)
4. **C. practised** (the "i" in "practised" is pronounced differently from the others)

**II. Choose the letter (A, B, C or D) to indicate the word that differs from the other three in the position of primary stress:**

1. **B. harmful** (the stress is on the first syllable, while the others have second-syllable stress)
2. **C. affection** (the stress is on the second syllable, while the others have it on the first)
3. **A. money** (the stress is on the first syllable, while the others have it elsewhere)
4. **D. collect** (the stress is on the second syllable, while the others have it on the first)

Let me know if you need any further assistance!