Hi Kashaf,

Of course, you can do law. It does not matter that what you have done all matters is the fulfillment of eligibility criteria. Check here the eligibility criteria for 3 years LLB course and 5 years integrated LLB course. This is according to the Bar Council Of India.

http://www.barcouncilofindia.org/educational-criteria-educational-qualification-required-for-admission-into-3-year-and-5-year-law-courses-in-india/

Good Luck!