This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Medicine
[{'content': 'A 5 year old girl came with history of progressively increasing pallor since bih and hepatosplenomegaly. Which of the following is the most relevant test for achieving diagnosis - \nSelect and explain. \nA. Hb electrophoresis, B. Peripheral smear examination, C. Osmotic fragility test, D. Bone marrow examination', 'role': 'user'}, {'content': 'Answer: A \nExplanation: <p>Hb electrophoresis helps to confirm beta thalassemia (Hb F increased ,HbA2 increased ). </p><p>Reference :Harsh mohab textbook of pathology sixth edition pg no 322.</p>', 'role': 'assistant'}]