Hey Udit,
Admission in LLB Course at Allahabad University can be availed by LAT (Law Admission Test) which is a university level entrance examination for which the applications will be available from April,15th 2019 uptil May,08 2019 and the exams will be held on May, 22nd 2019 and whereas the age bar For LAT has been removed by the Allahabad High Court.
The fees for LLB 1st year : INR 1224
And while for the 2nd year : INR 1204
Whereas for the 3rd year : INR 1204
Hope it helps :)