Yes, with 527 marks in your 10th board exam, you are likely eligible to take the PCB (Physics, Chemistry, Biology) stream in 11th grade.

Many schools in India have a general eligibility criterion of around 60% aggregate for the science stream, though some may have slightly different requirements.

Since 527 out of 600 (which is roughly 88%) is well above the typical 60% threshold, you should be able to choose PCB, but it's always a good idea to confirm with your specific school.

Thank you!!