<prompt> A 20 yrs adult presents with severe hypoplastic anemia. What is most effective treatment :a-interferonIL-2ATG therapyBone marrow transplantation  <response>: Answer is D Bone marrow transplantation Bone marrow transplantation is the best therapy for the young patient with a fully histocompatible sibling donor. The curative treatment for young 20 year-old patients with severe idiopathic aplastic anemia is allogenic bone marrow transplantation if there is an available donor. Those with a compatible sibling donor should proceed to transplantation as soon as possible. 