A free program for Android, by Therithal Info.

TamilNadu State board 9th, 10th, 11th, and 12th Class/Standard book back Solution, questions, and answers. It is a free app that provides you with a complete solution of all the questions and answers that are present in the standard book. You can use this app as a guide to help you in your school exams and also to prepare for your upcoming exams. It is also useful for those who are preparing for OJK, HSC, and other exams.

This app is a one-stop solution for all the students who are preparing for their exams. You can find all the answers to the questions in the book and also in the online section.