Irrelevant Sentence

[Honore]

Dear Teacher,

I would appreciate if you could please find and explain the irrelevant sentence among the following choices.

Regards,

(I) We haven't conquered space yet.

(II) With gravity, life in space can be based on our experience on Earth.

(III) We have sent some twenty men on camping tips to the moon.

(IV) The USA and the Soviet Union have sent people to spend restricted lives orbiting the Earth.

(V) Astronauts and scientists can live and work in space for a few days only.

[Tdol]

II sounds a bit irrelevant as we don't have gravity in space.

[Honore]

Dear Editor,

Thank you so much for your explanation.

Regards,