All of them are people
She has a headset on that is used as a phone. Not the best example of a telephone.
The one in the middle has only one person, so I would have eliminated that one right away. I would have guessed that the one on the right would be for family. I still agree with you that they should have picked a better picture for "people" with more than two persons in it. When you don't know any of the words, I recommend using a dictionary. http://dictionnaire.reverso.net/anglais-russe/people http://dictionnaire.reverso.net/anglais-russe/family Of course my dictionary was for Russian, here is one for Ukrainian: http://www.freelang.net/dictionary/ukrainian.php
That happens. Duo just picks random pictures for the wrong answers. Not infrequently they are indistinguishable from the pictures for the right answer, unless you already know the words, in which case you're best off ignoring the pictures.