Sunil, : The official brochure says: "If you are repeating 12th exam, you should do it for the all the subjects to pass 12th again as mentioned in the BITSAT brochure. If you take improvement exams in PCM/PCB only, you are not eligible. "

Going by this, you should appear for improvement exams in all your 12th subjects and pass the 12th exam and secure the minimum required aggregate. You cannot appear for improvement exams only in specific subjects.

Hey Sunil,

For BITSAT, the eligibility criteria is that you must have completed 10+2 from a recognised board. You must have overall 75% in 12th with Physics, chemistry and mathematics/biology as your subjects. And it is also compulsory to have proficiency in English language. You must have 60% score individually in each of the subjects.
Now, the last date for application is 31st March, so if you qualify your improvement examinations and are able to get your results before the deadline, then you can apply for BITSAT. You will need your 12th score while filling the online application form and so, your marksheet will be needed.

Kindly check the link below to see more details about the examination:
https://www.google.com/amp/s/engineering.careers360.com/articles/bitsat/amp

Hope this helps!

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