Q:

Statements:
 1. Some students are teachers.
 2. All teachers are boys.

Conclusions:
 I. All students are boys.
 II. Some boys are students.
 III. Some boys are teachers.
 IV. All teachers are students

• 1
  Only I follows.
• 2
  Only II and III follows.
• 3
  Only IV follows.
• 4
  Only I and III follows.