input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** Progenitor hematopoietic stem cells originate in   (A) Bone marrow   (B) Thymus   (C) Lymph Node   (D) Spleen
output: ['(A) Bone marrow <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Bone marrow  (B) Thymus  (C) Lymph Node  (D) Spleen <> possible answers', '  Progenitor hematopoietic stem cells originate in <> context']