The app contains all the answers to the questions from the book. It's also a good idea to practice and revise the questions as well as the answers, in order to get a better score.

There are also different tests that can be taken from the app. These tests will help you to measure your progress and to get a better score. The app also contains all the answers and the solutions to the questions.

This app is a guide book that can be used for self-learning purposes and also for teaching purposes. It's a good idea to practice and revise the questions and answers, in order to get a better score.