Dear Ankita,

First of all , it is best to practice PYQ's of DUET for better understanding of the exam pattern .Well, I can recommend you to study 11 and 12th NCERT books of psychology too. Those can help you to clear your concept more clearly !It is available in online !

You can buy this books also for your reference!

• Psychology by Ciccarelli and White
• Psychology: The Science of Mind and Behavior by Passer and Smith

Some subject specific books are given below:

• Statistics: King and Minium, A.K. Singh
• Social psychology: Baron
• Abnormal psychology: Butcher and Mineka

Hope this helps !

best wishes !!