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:

All benches are Helmet

No Helmet is Chair

Conclusions:-

I. All Benches are Chair

II. All Helmet are benches

III. No Helmet are Benches

IV. No benches are chairs

only Conclusion IV follows