This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
[{'content': 'Which of the following disorders mimic each other \nSelect and explain. \nA. Iron deficiency anemia and sickle cell anemia, B. Sickle cell anemia and Thalassemia, C. Thalassemia and Iron deficiency anemia, D. Iron deficiency anemia and vitamin B12 deficiency anemia.', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Both present with microcytic hypochromic anemia.\nMentzer index is used to diffeentiate between the two. It is less than 13 in Thalassemia. (MCV / RBC Count).', 'role': 'assistant'}]