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
Haemoglobin F is raised in - 
Select and explain. 
A. Juvenile chronic myeloid leukemia, B. Hereditary spherocytosis, C. Congenital red cell aplasia, D. Myasthenia gravis
A: Juvenile chronic myeloid leukemia
Answer: A: Juvenile chronic myeloid leukemia 
Explanation: <p>In juvenile CML, peripheral smear shows leukocytosis.Thrombocytosis & anemia are common.Leukocyte alkaline phosphate score is normal or low & fetal hemoglobin levels are elevated.</p><p>Reference :OP Ghai essential pediatrics 8th edition pg no608.</p>