1. 

Statements: Some houses are offices. Some offices are schools.

Conclusions:

I.   Some schools are houses.

II.  Some offices are houses.

III. No house is school.

IV. Some schools are offices.

A. Only II and III follow
B. Only I and IV follow
C. Only either III or IV, and I follow
D. Only II and IV and either I or III follow.

Answer: Option D

Explanation:

Since both the premises are particular, no definite conclusion follows. However, I and III involve only the extreme terms and form a complementary pair. So, either I or III follows. II is the converse of the first premise while IV is the converse of the second premise. Thus, both of them hold.