Hello ankesh....

In fact, you can depend on any reference book such as reference guides and other answer solution provided by different publishers  . The more you become clear to your topics and doubts, the more you need the reverence to such books. In my opinion the ncert texts are the best as it provides the knowledge about the syllabus step by step with the relevant homework and other exercises . .moreover for students requiring extra knowledge it recommends the miscellaneous exercises for higher order thinking skills. Nowadays there are number of guides available in the market which can help you well to get in best understanding with the syllabus

Hope this information helps you ..

All the best for your future.....