<prompt> Which of the following has the least 5 year survival rate following allogenic bone marrow transplantation?Severe Combined Immunodeficiency stateAplastic AnemiaBlast crisis in CMLChronic lymphocytic leukaemia  <response>: Blast crisis in CML has the least 5 year survival rate following allogenic bone marrow transplantation. 5 year Survival rate after bone marrow transplantation: A.M.L 40-60 A.L.L 40-50 C.M.L Chronic phase 70 C.M.L Blast crisis 15 C.L.L 50 N.H.L 40 SCID, Aplastic Anaemia, Thalassemia 90 