Two 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 mobiles are instruments.
All instruments are heavy items.
Conclusions:
I. Some mobiles are heavy items.
II. No mobile is a heavy item.
III. Some heavy items are instruments.