Undoubtedly, NCERT Books offer a brilliant start in the preparation. However, AIIMS MBBS is an objective type exam and it is mandatory for aspirants to practice MCQs. There will be 200 objective type questions. Of which 50% might be asked from NCERT concepts, while these other best books for AIIMS MBBS 2019 will be the best source to answer the remaining questions.
Best books for physics:
Physics books for class 11 and 12(NCERT)NCERT Physics:CBSE PMT(three volumes) by anil AgarwalObjective physics for medical entrance exam (volume 1 and 2) by D.C . PandeyConcept of physics by H.C. VermaAIIMS explorer by MTG editorial boardFundamental of physics by halliday and WalkerBest books for chemistry
Chemistry books for class 11 and 12 (NCERT)Physical chemistry by OP TandonConcise inorganic chemistry by J.D LeeTextbook for organic chemistry by Arihant PrakashanDinesh chemistry by P.N KapilModern ABC of chemistry by Dr.S.P jauharBest books for biology
Biology books for class 11 and 12 (NCERT)Objective biology by DineshA class-book of botany (A.C Dutta)Pradeep publication for biology by P.S.Dhami and G.chopra

Thanks sir.....