Ofcourse you can !!!
90 days are more than enough if you are clear with basics .
There are 98 chapters in NEET Syllabus
( The breakup is as B-38 , P- 30 , C-30)
- Things you need to stop doing right away :-
a. Doubting yourself
b. Procrastinating
c. Planning your preparation
d. Wasting time reading quora answers - Things you need to do :-
1. Biology :-
a. Do one chapter everyday . Small chapters like living world , digestion , cell cycle etc can be done together .
b. Focus on diagrams
c. Focus on back exercise of ncert. Read line by line.
d. Revise imp units like genetics , human physiology , biotechnology more often . ( 38 chapters can be done within a month)
e. Books to refer :- NCERT , ARIHANT PAPERS OF LAST 30 Years , Mtg Fingertips2.Physics:-
a. Refer YouTube channels like physics wallah if your basics are not clear
b.Make a summary sheets with all formulas and keep practising and revising them
c. Solve last 30 years papers of physics.
d. DONT do books like DC Pandey or HC Verma as there is no time for it.
e. You can solve Mtg questions they are more formula and Ncert based.3. Chemistry :-
a. Start with last 4 chapters of NCERT and try finishing them in a day or two ( Chapters like biomolecules , polymers , CIEL are “free ke marks “ . Thats what our seniors told us always and 4–5 questions are always from there.
b. Just do NCERT ONLY!!! I can’t stress more on the importance of ncert in chemistry . Be it organic or inorganic. Neet 2020 was completely ncert text based
c. Keep the order as Physical -> Inorganic -> Organic.
d. Solve a lot of questions in physical chemistry
e. Do metallurgy and chapters like Coordinated compounds as priority
f. After you have done chemical bonding do all 4 chapters of s ,p ,d ,f block altogether . Remember the structure of acids. Its one of the most repeated questions.
g. Do reaction mechanism properly in organic and especially class 12 th organic.* It will take you around 3 months to do all this and you ll be left with 2 months more.
So do all this then :-
1. Do multiple revisions.
2. Solve one paper daily.
3. Work on your mistakes
4. Take part in AITS.
5. Keep calm and stay away from negativity !!!