<prompt> Method of prevention of GVHD in bone marrow transplantation is:T-cell removalPrior immune suppressionPost procedure immune suppressionAll of the above  <response>: The following are the steps taken to reduce the risk of graft versus host disease: Getting the best donor match: donor is as closely matched to recipient with the technique of tissue typing. Use of immunosuppressive drugs like ciclosporin, tacrolimus etc T cell depletion: Removal of T cells from the donors bone marrow is called as T cell depletion. Post procedure immune suppression using the drugs like methotrexate and cyclophosphamide. 