Yes, you can definitely prepare for the AIBE (All India Bar Examination) even if you have a PCB (Physics, Chemistry, Biology) background in your Class 12. There are no specific subject requirements for appearing in the AIBE. The exam assesses your knowledge of legal principles and your aptitude for the legal profession.

Having a background in Law (through a Bachelor of Laws - LLB degree) is generally considered advantageous for the AIBE. These students would have a strong foundation in legal concepts.

I hope it helps!