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:
Some tests are exams.
Some exams are viva.
All viva are theories.

Conclusions:
I. Some theories are exams.
II. Some theories are viva.
III. Some tests are viva.