Statements:
Only Pocket are Purse
All Chain are Pocket
A few Zip are Pocket
Conclusions:
I. Some Zip can never be Purse
II. Some Zip are Chain
III. No Purse is a Chain
Only Pocket are Purse → All Purse are Pocket and Purse cannot have positive relation with anyone but in conclusion it is has negative relation. Hence conclusion I and III follow. All Chain are Pocket (A) + Some Zip are Pocket (I) → Conversion → Some Pocket are Zip (I) → No conclusion. Hence conclusion II does not follow.