Translation:Az autó van ott, vagy a lány?
Is it ok to say: "Az autó ott van, vagy a lány?" ...
No, the first half of the sentence should be a question also, as you put it, that would make it a statement.
Tx a lot. I understand.
I used "oda" instead of "ott." Why is that incorrect?
Oda means to there, specifying a direction.