Statements:
Some mats are bedsheets.
All bedsheets are chairs.
Some chairs are desks.
Conclusions:
I. Some desks are bedsheets.
II. Some chairs are mats.
III. Some mats are desks.
A + I = No conclusion. Hence, conclusion I and III will not follow. Some mats are bedsheets (I) + All bedsheets are chairs (A) = Some mats are chairs (I) ⇒ conversion ⇒ Some chairs are mats (I). Hence, conclusion II will follow.