HELLO,

Its is unlikely that you can get admission into top B.TECH Programs in CSE , ECE or Biotech in Kolkata  with a 53% score in 12th boards especially if you want popular courses like CSE .

Direct admissions in Kolkata:-

1. Some Private engineering colleges in Kolkata may offer you direct admission to Btech Programs based on your 12th grade marks potentially through a management quota.

2. While direct admission may be possible these colleges might have their own score requirement for specific branches like CSE which could be 80% or higher

3. You can try management quota seats which are typically offered based on merit and availability and may require a higher percentage than the general admission criteria

4. If you go with direct admission you might have to pay higher fees compared to those admitted to entrance exams

Hope that helps!