Dear Sona,
There is Facult of Law, one can do 3 year LLB from here. For that you have to sign up at Chancellor Portal (http://jharkhanduniversities.nic.in/home/admission/application/dspmu). For any technical help you can contact mail.cponline@gmail.com.

You can See the list of constituent and affiliated colleges @ http://www.ranchiuniversity.ac.in/2014-03-31-05-30-13/colleges.html

Apart from this, There is an option of doing LLB from Chotanagpur Law College

It takes admission through LSAT-India Score, I am providing you the contact detalis of this college.

Chotanagpur Law College
Nyay Vihar Campus, Namkum
Ranchi – 834010
Jharkhand, India

Phone: 0651-2205877 (O), 0651-2261050 (O)
Fax: 0651-2205877

Email: info@cnlawcollege.org

I hope it helps!