Three statements are given followed by three conclusions numbered I, II and III.
Assuming the statements to be true, even if they seem to be at variance with commonly known facts, decide which of the conclusions logically follow(s) from the statements.

Statements:
All males are boys.
Some teachers are boys.
All students are teachers.

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