I am in b.com 3rd yr right now. And i want to pursue law for my post graduation. After that, will i need to do LLM too?

After B. Com you need to LLB. But a Law degree alone is not enough to become a practicing lawyer. After completing Law School, one must pass the All India Bar Exam (AIBE).Eligible persons are admitted as advocates on the rolls of the State Bar Councils. Those admitted as advocates by any State Bar Council are eligible for a Certificate of Enrolment. Students who do not like joining business law can find greener pastures in environment or Human Rights in reputed organizations like CSE, ICRC, UNHCR etc. For LLM students from premier Law schools, Business Laws and IP Laws are the branches, which offer excellent career opportunities. You can consider below written options for doing LLB:

National Law University, Jodhpur, ILS LAW COLLEGE - PUNE, National Law School of India University ,Bangalore, Gujarat National Law University, School of Law - LOVELY PROFESSIONAL UNIVERSITY - JALANDHAR, THE WEST BENGAL NATIONAL UNIVERSITY OF JURIDICAL SCIENCES -KOLKATA, THE NATIONAL LAW INSTITUTE UNIVERSITY - BHOPAL, FACULTY OF LAW , BANARAS HINDU UNIVERSITY, VARANASI, FACULTY OF LAW -UNIVERSITY OF DELHI, NEW DELHI, NATIONAL LAW UNIVERSITY - NEW DELHI, MS Ramaiah College of Law - Bangalore, Christ University-Bangalore, NALSAR University of Law , Hyderabad,

After your bcom gaduation, you will be required to do 3 year LLB course. And once you complete your 3 year LLB course, further can do LLM for 1/2 years.

LLM is not compulsory and depends on your choice in case you want to specialize in a particular field.

After your 3 year LLB, you can appear for AIBE exam and practice law in court.

Rest depends on your interest.

Good Luck.