The following are multiple choice questions (with answers) about medical knowledge.   **Question:** HbA2 is raised in:   (A) Beta thalassemic trait   (B) Sickle cell anemia   (C) Hereditary spherocytosis   (D) None
['(A) Beta thalassemic trait <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Beta thalassemic trait \n (B) Sickle cell anemia \n (C) Hereditary spherocytosis \n (D) None <> possible answers', '  HbA2 is raised in: <> context@']