Two statements are given, followed by four conclusions. 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:

1. Some men are Bengalis.

2. All women are Bengalis.

  Conclusions:

I. No Bengali is a man.

II. Some women are men.

III. All women are men.

IV. No woman is a man.