hi sushant, you still have 5 months time and if you work smart, you can really score well easily, i will tell you how to prepare,

Physics and chemistry- physics is considered one of the toughest subject for medical aspirants,but very interesting. choose any good book of your convinience, there are plenty of good books as many mentioned already. read the concepts thoroughly,understand them cover to cover, if you have doubts, clear them then and there. solve atleast 300 to 500 questions per chapter, check ,analyse and rectify your mistakes. solve again. the more you solve the merrier.initially you wont be getting many correct answers, but as you keep on doing am sure you will see your score rising. solve previous question papers too

Biology-aiims doesnt cover most part from ncert like how neet does, in neet around 300 marks are from ncert text book itself, so u need to thorough ncert first and then read any good book of your choice and solve as many questions as you can

General knowledge and current affairs- read newspapers regularly, keep yourself updated always, use year books, they ll help you alot.

hope this helps, ping me if you have any more queries, happy to help, good luck

I would suggest you to make all your concepts clear as to score good in physics and chemistry good understanding of basics is very important because these two subjects are concept, problem and understanding based and for this purpose NCERTs would be the best choice to build the concepts strong and clear so practice these books properly. Also, once you are done with these, you can refer other books like H C Verma for Physics,Aggarwals’ Concept of Competition Physics for CBSE PMT,Objective Physics for Medical Entrances Examination (Volume 1 and Volume 2) and for chemistry Modern ABC of Chemistry for Class 11th & 12th (Vol. 1 & 2), Arihant Organic Chemistry and Physical Chemi stry by O P Tandon.

Note : Once you complete your syllabus then start practising the sample and previous year papers to know the important topics and questions and after all these your next step should be online mock test as these are very helpful to get to know all your weak areas and it will also help you to learn time management skills during the exam.

Good Luck!!!