Hello Shruti

You should refer to NCERT books first for your preparation make sure you don't skip NCERT book. Most of the questions from Inorganic chemistry is directly from NCERT.

After, completing your NCERT you can refer to OP Tandon

Make sure you refer to previous year papers to get an idea about the type of questions asked in the exam and MCQs for your practice.

It is recommended to focus on the topics which carries more weightage in the exam.

All the best!!