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: Pediatrics
[{'content': "A boy presented with weakness in lower limbs, calf hyperophy, positive Gower's sign and an elevated CPK value of 10,000. The most likely diagnosis is: \nSelect and explain. \nA. Duchenne Muscular Dystrophy, B. Spinal Muscular Atrophy, C. Myotonia congenita, D. Myotonic Dystrophy", 'role': 'user'}, {'content': "Answer: A \nExplanation: A male child presenting with lower limb weakness, calf hyperophy, Postive Gower's sign associated with high levels of CPK suggests the diagnosis of DMD. Ref: Essential of Pediatrics By O P Ghai, 6th Edition, Page 547-548", 'role': 'assistant'}]