Hi

Yes, you can do 12th again with PCM and after that you will become eligible for JEE main examination

For your reference,

Jee main eligibility criteria is given below-

--------) Qualification required :- to be eligible  for JEE mains you need 10+2/equivalent qualification.

--------) Passing year :- one is eligible for JEE main examination for consecutive three years starting from the year of appearing for 12th /equivalent examination i. e to be eligible  for JEE mains 2022 you should be either appearing for 12th board exam or equivalent  in 2022 or should have passed it in 2021 or 2020

--------) There is no age limit to be eligible

--------) there is no minimum percentage requirement to be eligible for JEE Main.

But yes,

To be eligible for NITs, IIITs, CFTIs one needs at least 75% marks in class 12th if belongs to General or OBC category  or at least 65% marks in class 12th if belongs to Sc or St category. For only this year i. e 2021 this minimum percentage requirement of 75% - 65 % was lifted off.

For detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

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

Thank you