"Which is my room?"
Translation:Quelle est ma chambre ?
I actually wrote it correctly, but wasn't so sure about how to spell "laquelle" so I hovered over the "which", and Duo suggested three words - laquelle was not one of them. Then I tried Google translate and it suggested "Qui", which was also one of Duo's suggestions. So I changed my "laquelle" to "qui" and was marked wrong. Uuuuurgh.