If you are planning to do the M.Phil in Social Work from the IGNOU then it is not possible. The IGNOU is not conducting the M.Phil in Social Work course. However you can do the PHD in Social Work from IGNOU. For doing the direct PHD from IGNOU in Social Work stream, you must have the 5 years professional work experience in the social work at senior level and also you have to pass 32 credits worth of course work.
For doing the M.Phil in Social Work, you can check the Website of Delhi School of Social Work. TISS is also offering M.Phil in Social Work.