Hello Aspirant,

Since you have not mentioned the name of examination for which you are seeking information so it is little bit difficult for us to guide you accurately but if we go through your profile then it shows that you are an engineering aspirant so you might be interested in JEE-Main, if not then please mention the correct name of examination in the comment section below.

Now let me make you clear that there is no percentage criteria to appear for JEE-Main so even if you are unable to secure minimum 75% marks in your PUC then also you can appear for JEE-Main, but there are some criterion which you need to satisfy in order to appear for JEE-Main so let us discuss them.

1--- Age criteria :- There is no age limit to appear in JEE-Main but note that there might be the age limit in any particular institution taking admission through JEE-Main score, so you should keep this thing in mind.

2--- Qualifying Examination :- To be eligible for JEE-Main one should have passed 10+2 examination with Physics, Mathematics as mandatory subjects along with one of the Chemistry/Biotechnology/Biology/ Technical Vocational subject from any of the recognized central or state board.

3--- Year of qualification :- For JEE-Main 2022 only those candidates who have passed Class 12 / equivalent examination in 2020, 2021 or 2022; or those who will be appearing in Class 12th / equivalent examination in 2022, would be eligible to appear.

So if you follow all above criterion then you are definitely eligible for JEE-Main.

For more details kindly check out the link given below :-

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

But note that for admission to NITs/IIITs/CFTIs you need at least 75% in your PUC 2nd year as per the general eligibility criteria but as we all know that this percentage criteria is currently on hold due to the current pandemic so for now it is not active and hence you are also eligible for admission to NITs/IIITs/CFTIs based on your JEE-Main score, until and unless the criteria gets restored.

As you are preparing for JEE-Main 2022 so I am enlisting down some best books for your preparation which you can use for your preparation :-

@Physics

Concepts of Physics-H. C. Verma

Fundamentals of Physics-Halliday, Resnick and Walker

Problems in General Physics-I. E. Irodov

University Physics-Freedman and Young

Understanding JEE physics series-DC Pandey

Problem In Physics-SS Krotov

@Mathematics

Higher Algebra-Hall and Knight

Coordinate Geometry-S.L. Loney

Differential and Integral Calculus-N. Piskunov

Calculus and Analytic Geometry-Thomas and Finney

IIT Mathematics for JEE Main & Advanced-M.L. Khanna

Course in Mathematics for IIT-JEE-Tata McGraw Hill publication

Problems Plus in IIT Mathematics-A Das Gupta

Trigonometry-S L Loney

@Chemistry

Modern Approach to Chemical Calculations-RC Mukherjee

Organic Chemistry-Solomons and Fryhle

Concise Inorganic-J. D. Lee

Organic Chemistry-Morrison and Boyd

University Chemistry-Freedman and Young

Physical Chemistry-N Awasthi

Arihant's Practice Book Chemistry for JEE Main And Advanced-R.K Gupta

You can also check out the JEE-Main knockout package for preparation of JEE-Main 2022 from the link given below :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

I hope this information helps you.

Good Luck!!