I would like to tell you that the LSAT examination is only necessary for some particular universities and colleges.
I would suggest you visit the careers360's link given below which has detailed info of the Law course for 3 years with all the eligibility criteria .
The link for the same is:https://law.careers360.com/articles/9564-law-entrance-tests
Hope this helps and all the best!
LSAT India is an entrance exam for admission in various Law colleges in India like Jindal Global Law School, IIT Kharagpur etc for 3 year law course. It is one of the most sought after law entrances for 3 year LLB but it isn't compulsory. There are various other entrances too for admission in 3 year law courses. Here is a list of various such entrance exams.
DU LLb- Delhi University
MH CET- GLC Mumbai, ILS Pune and other law colleges in Maharashtra
PU LLB- Panjab University,Chandigarh
TS LAWCET- Law colleges in Tamil Nadu
BHU LLB- Banaras Hindu University.
BVP LLB- Bharatiya Vidyapeeth University
You can apply for these in your final year of UG degree or after completion and you'd be eligible to take admission only if you score the minimum qualifying percentage in your UG degree which is usually 45-50%. You can use the link below for any other information.
Best of luck