Explanation : All categorical syllogisms have a ''mood''
and a "figure."
The mood of a categorical syllogism is
a series of three letters corresponding to
the type of proposition (A, E, I, or 0) the
major premise, the minor premise, and the
conclusion are.
The types of the given propositions are as
shown below:
Some chairs are curtains (I)
All curtains are bedsheets (A)
Conclusion: Some chairs are bedsheets (I)
So, the mood is IAI.