Hey Sam,

There is no particular app or website for doubt clearing anyways you have apps for Preparation but not for doubt clearing few of them are

NEET prepartion. ...

NEET 2018. ...

AskIITians - IIT JEE, NEET, SAT, CBSE, ICSE Prep. ...

Aakash iTutor: NEET & IIT-JEE. ...

NEET 2018, AIIMS UG Preparation. ...

NEET Practice. ...

Pre-PG Prep: NEET, AIIMS-MCQs, NEET PG Test Series. ...

YouTube. Developed by Google.

Dear Student,

Greetings.

First of all wish you all the best for the exam to score good marks. We are always there to help you. You can take help of the link below of Careers 360 to get the solved examples for the question of NEET exam:

https://medicine.careers360.com/articles/neet-question-paper