Go through NCERT book. It is the most important book for Physics board exam of class 12th. All topics in the syllabus for the exam are covered in the NCERT book.
Refer a supplementary book like Haliday-Resnick-Walker only if you do not understand a certain concept from the NCERT book and to practice more numerical problems.
I also have a suggestion of an App for your complete Study & Exam preparation is “Oye Exams” Available at Google Play Store which can help you to make your Board exams easy.