... and you could only save either the human being or the dog, which one would you choose?
I would save the dog, parrot, cat, pig, snake, chicken or any other living being but not the person. It's a logical option for me.
You?
Unless I personally know the person from before or the person is not related to anyone I know, I would rather save a dog.
In fact I'd trade an entire African or Arabian nation's population for one St Bernard.