Hey,
The syllabus of NEET and AIIMS include the Physics,Chemistry and Biology of class 11th and 12th. First of all, be thorough with NCERT. Because many times,questions have directly come from NCERT.
You can follow MTG Publication for Physics. For Chemistry,follow OP Tondon. For Biology,follow Pradeep or Dinesh.
Hope this helps.
Good luck.

Hello Ayush das

Yeah I will provide the best books for the AIIMS and NEET they are 

For physics H C vema

For chemistry O P Tandon

For biology MTG 

And moreover before refering these reference books first please study well the NCERT books

All the best 

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