Q:

Statements :
All books are files.
Some files are papers.
All papers are certificates.
No certificate is magazine.
Conclusions :
I. At least some books are papers.
II. No magazine is book.
III. At least some certificates are files.
IV. No paper is book.

• 1
  Only I, II and IV follow
• 2
  Only II and III follow
• 3
  Only I and IV follow
• 4
  Only III follows
• 5
  None of these