Here are the words with different main stress patterns:

1. **A. develop** - main stress on the second syllable (de-**VEL**-op)
2. **B. government** - main stress on the first syllable (**GOV**-ern-ment)
3. **A. rescue** - main stress on the first syllable (**RES**-cue)
4. **A. practical** - main stress on the first syllable (**PRAC**-ti-cal)
5. **A. whistle** - main stress on the first syllable (**WHIS**-tle)

So, the words with different stress from the others are:

1. **A. develop**
2. **A. rescue**
3. **A. practical**
4. **A. whistle**

In terms of finding one from each group that’s different, it may depend on the context, but "develop" is stressed differently compared to the others in the first group.