1. 

Statements: Some tapes are discs. Some discs are cassettes. Some cassettes are songs.

Conclusions:

I.   Some songs are discs.

II.  Some cassettes are tapes.

III. Some songs are tapes.

IV. No song is a disc.

A. Only either I or IV follows
B. Only either II or IV follows
C. Only III and IV follow
D. Only III and either II or IV follows
E. None of these

Answer: Option A

Explanation:

Since each combination of premises shall contain two particular premises, no definite conclusion can be drawn. However, I and IV involve the extreme terms of the second and third premises and form a complementary pair. Thus, either I or IV follows.