Statements: a. All books are notes.
b Some notes are watches.
c. No watch is a pencII.
Conclusions: I Some watches are books.
II Some notes are pencIIs.
III No watch is a book.
IV. Some notes are not pencIIs.

Options

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

Answer

D

Explanation

I and III have a conclusion between .watches and books. For a conclusion between watches and books our relevant statements are (a) and (b). Now, (a)+(b) =A+1 = No conclusion. But, I and III make an I-E pair, which is complementary. Hence, either of them to follows. Also, (b)+(c)-1+E-O=Conclusion IV.