Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements.

Statements:
No door is a window.
No rack is a door.
All cupboards are windows.

Conclusions:
I. Some cupboards are racks.
II. No cupboard is a door.
III. No rack is a window.

Only conclusion II follows