Hello Student,

If You're not able to do well in 12th standard then you should do something about it because 11th & 12th standards syllabus makes our basic foundation strong. Hence if you will not study well how can you qualify the examination.

As per my knowledge, You may not be able attempt the JEE Advance Examination.

Further for more information You can go through the Eligibility Criteria of Jee Advance Exam.

Eligibility criteria for JEE Advance Examination are:

• Candidates should be among the top 2,50,000 successful candidates (including all categories) in B.E./B.Tech. Paper of JEE Main Exam.
• A candidate should have appeared for the Class XII (or equivalent) examination for the first time with the subjects Physics, Chemistry, and Mathematics.
• A candidate can attempt JEE (Advanced) maximum of two times in two consecutive years. Lets understand these with example, If the student has completed his/her class XII (or equivalent) examination in 2021 then he/she will be able to give Jee Advance Exam in the year 2021 & year 2022 only. Later on he/she will not be able to appear in the Examination.

Be Consistent with the study & be self confident.

Hope This Information helps you a lot.

Best Wishes!