Hii Akriti Gupta... Admission Process for Integrated First Degree Programmes: Students can gain admissions to the BITS Integrated First Degree Programmes by securing a good score in BITSAT. However, please note that the eligibility for admission is subject to fulfilling the requirement of minimum marks in 12th examination.

The institute also offers direct admissions to " Board toppers/first rank holders" of all central and state boards to the programme of their choice, irrespective of their BITSAT scores.

If you are the board topper or first rank holder of central or state(that depends on which board you took) then you can get direct admission.

Hope this helps you. All the best.

Hiii

No its not possible to get direct admission to BITS on the basis of 12th class marks. It is compulsory to appear in BITSAT exam and qualify it with good marks to get admission into BITS.
you can refer to following links for more details.
http://bitsadmission.com/
https://engineering.careers360.com/articles/bitsat

Thanks!!!