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 stones are bricks.
No cement is a brick.
Some marbles are stones.

Conclusions:
I. Some bricks are marbles.
II. Some cements are stones.
III. No marble is a brick.