The word 'dengan' is not in the options.
Can anyone explain the grammar is this sentence: siapa yang bersama kau? It seems there's some confusion as the correct answer for the multiple choice is "siapa yang bersama kau?" but then the discussion page leads to "dengan siapa kamu?"
Actually all of the Indonesian sentences that you typed mean(s) "whom are you with?"
The word 'Dengan' is not in the options....please review...
Dengan is not one of the options
"bersama" also means "together with". I think this part is trying to teach you "bersama"... that's why. :/