Hey Aashi.

If you're pursuing your undergraduate degree you can appear entrances of for 3 year LLB courses in your final year. The colleges offering LLB degree will require a minimum aggregate of 50% or 55% according to their criteria in your UG degree in any disciple. Hence you'll be eligible to apply only once you're in your final year. Various colleges offering 3 year LLB courses are DU, PU, BHU, BVP, GLC Mumbai, ILS Pune, Symbiosis etc.

Best of luck