Please find below the top four B-schools for the HR specialisation.

1. XLRI Jamshedpur
2. TISS
3. XIMB
4. IIM Ranchi - PGDHRM

Hope you find this answer fruitful.

The top 4 institutes in India to pursue MBA in HR are:
XLRI Jamshedpur
TISS Mumbai
SCMHRD
MDI (HR program)

Adding to Akshay's answer, TISS also offers a good program in HR where candidates are selected through TISSNET

Top colleges for Human Resource management in India are:

• Xaviour Labour Relations Institute (XLRI), Jamshedpur which offers a PGDHRM degree and you get admission through a XAT exam

• Management Development Institute  (MDI), Gurgaon also offers a specialized PGP (HRM) degree and you get admission through a CAT exam

• IIM Ranchi offers a PGDHRM  course and you get admission through a CAT exam

• Narsee Monjee institute of Management studies offers a MBA in HR degree and you get admission through a NMAT exam

• International Management Institute (IMI), Delhi offers a PGDHRM course and you get admission through a CAT exam

Other than these b-schools which offers a specialized HR degree you can always look for top colleges who are overall good in studies and placements like old IIMs  (IIM A, B, C, L, K, I ), FMS, IBS Hyderabad, S P Jain, Jamanlal institute, Symbiosis, IIT Bombay, IIT Delhi, IIT Kanpur, IIT Madras etc.

For getting admission in such top reputated college you need to get a very high percentile and score in CAT, CAT and GMAT exam along with your decent academic records.

All the best!!