Statement:
Some pipes are tanks.
All tanks are lids.
All lids are covers.
Conclusion:
I. Some covers are lids.
II. Some pipes are covers.
III. Some pipes are not lids.
All lids are covers(A) → Conversion → Some covers are lids(I). Hence, conclusion I will follow. Some pipes are tanks(I) + All tanks are lids(A) → Some pipes are lids(I) + All lids are covers(A) → Some pipes are covers(I). Hence, conclusion II will follow but conclusion III will not follow.