input: The following are multiple choice questions (with answers) about medical knowledge.   **Question:** An 8 year old boy complaints of increasing muscle weakness. On examination, his calves are bulky and show muscle tightening. His serum creatine kinase levels are increasing with age. Which of the following is the most likely diagnosis?   (A) Hereditary sensorimotor neuropathy   (B) Myelin deficiency   (C) Dystrophin deficiency   (D) Congenital myopathy
output: ['(C) Dystrophin deficiency <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Hereditary sensorimotor neuropathy  (B) Myelin deficiency  (C) Dystrophin deficiency  (D) Congenital myopathy <> possible answers', '  An 8 year old boy complaints of increasing muscle weakness. On examination, his calves are bulky and show muscle tightening. His serum creatine kinase levels are increasing with age. Which of the following is the most likely diagnosis? <> context']