Dear Manish
The admission to the Bachelor of Law(B.A LLB) course is done following the merit list prepared on the basis of the entrance examination  conducted by University of Calcutta. 

Any person passed H.S(10th+2) examination with maximum 45%(40% in case of SC,ST,PH) marks in aggregate (taking consideration best of 4 papers excluding WBCHSE environmental studies).
ALL THE BEST BUDDY