No, it isn't a trick question. They don't want you to talk about stuff you already put on your application. This question is there to see if you are still pursueing experiences in dentistry or if you just stopped after submitting your application. I was annoyed with this question, but I was fortunate to have been selected to start in a new research with the Punjabi population and the rate of caries.
This question shows two things:
1.) How well you can read instructions, since majority of the people will just ramble on about the experiences they did put on the AADSAS app.
2.) Your passion and desire to explore dentistry beyond just submitting your application.
The other two questions are hard too. It took me three weeks to finish that supplemental app. But I guess it paid off. Lets see how everything goes on the 20th.
If you don't have any new things to tell them I would state that and the reason why.
If you have more ?'s please post or PM me,
DesiDentist