Question

Which of these is a valid conclusion?
Answer
All farmers wear straw hats.
My father wears a straw hat.
Therefore my father is a farmer.
All farmers wear straw hats.
My father does not wear a straw hat.
Therefore my father is a farmer.
All farmers wear straw hats.
My father is not a farmer.
Therefore my father wears a straw hat.
All farmers wear straw hats.
My father is a farmer.
Therefore my father wears a straw hat.

Answer 1

If you think about it only the last one is different from the rest in that the father is a farmer and all farmers wear straw hats. So you can easily some up with the last solution.

Answer 2

so its the last one?

Answer 3

yes