Hey Arup.

To be eligible to take the AIBE you need to possess a law degree either 3 year or 5 year from a recognised institute by the Bar council of India. Other than that you also need to register with the respective State Bar council to be eligible for the same. If you fulfil the necessary conditions you can appear for AIBE. Use the link below for any other details regarding the same. 

https://www.google.com/amp/s/law.careers360.com/articles/aibe-eligibility-criteria/amp

Best of luck