MBA is a 2 year course and you get to take your specialisation int he 2nd year. And for studying MBA, you will have to appear for any of the entrance examinations. There are quite a few Entrance examinations for MBA in India. Few of them are:

CAT: CAT is an online examination of 3 hours duration. To be eligible for CAT, you should have completed your Bachelor's degree in any discipline with a minimum aggregate of 50%. It is 50% for General Category and 45% for Reserved Categories.

MAT: To be eligible for MAT, you should have completed your Bachelor's degree in any discipline. There is no minimum aggregate criteria.

IIFT: To be eligible for IIFT, you should have completed your Bachelor's degree in any discipline with a minimum aggregate of 50%. It is 50% for General Category and 45% for Reserved Categories.

SNAP: To be eligible for SNAP, you should have completed your Bachelor's degree in any discipline with a minimum aggregate of 50%. It is 50% for General Category and 45% for Reserved Categories.

NMAT: To be eligible for NMAT, you should have completed your Bachelor's degree in any discipline with a minimum aggregate of 50%. Candidates with a minimum of 2 years work experience are preferred.

CMAT: To be eligible for CMAT, you should have completed your Bachelor's degree in any discipline. There is no minimum aggregate criteria.

Having said this, few Colleges for MBA HR are:

Xavier Institute of Social Service, Ranchi

Xaviers Labour Research Institute

TISS

International School of Business and Media

IIM Ranchi