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:

I. All markers are pens.

II. No pen is pencil.

III. Some pens are sharpeners.

Conclusions:

I. Some pens are markers.

II. No marker is pencil.

III. No marker is sharpener.

Conclusions I and II follow.