Hi,
I hope you know your question is somewhat unclear but I will try to answer it in the best way possible.
If you want to pursue PhD course after you finish your legal studies then you need to qualify in post graduation degree or complete M.Phil in Law in similar stream with a minimum aggregate of 55% from recognised board university & then you can apply for the admission process.
The admission process will be based on an entrance exam. If you have completed LLB degree then you also need to complete the master's degree to sit for the entrance exam to pursue PhD.
Hope this helps.
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