There is no update for nios student for neet 2018. My suggestion is jst to wait for any declaration.
And for aiims you must go through ncert books thoroughly. They will build your concept clearly. And moreover question comes mostly based on ncert books. Besides you may follow
FOR BIOLOGY
truemans
Dinesh mcq book
Arihant

FOR PHYSICS

H C Verma
DC Pandey

FOR CHEMISTRY
Arihant
For general knowledge you should stay updated. For this you must follow newspaper daily.

There is no update for NIOS student so I would suggest you to wait till any information comes out for NEET 2018.

 

Also, if you talk about your AIIMS preparation then NCERTs should be your first choice as these are good to make the basics clear and strong, apart from that below reference books will be helping you -

Biology -

 

Trueman’s Biology Vol. 1 & 2

 

Objective Biology by Dinesh

 

Pradeep Publication’s Biology

 

Prakash Objective Biology

 

 

Phyics -

 

H C Verma for Physics

 

Aggarwals’ Concept of Competition Physics for CBSE PMT

 

 

Chemistry -

 

Modern ABC of Chemistry for Class 11th & 12th (Vol. 1 & 2)

 

Physical Chemi stry by O P Tandon

 

Arihant Organic Chemistry

 

Dinesh Chemistry

 

 

Objective NCERT at your fingertips Chemistry by MTG

 

 

General Knowledge - It would be better to read newspaper on daily basis just to get all day to day information and along with this, you can subscribe weekly or monthly current affairs magazine and pay proper attention to science section.

Good Luck!!!

 

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