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
Perifascicular atrophy is seen in – 
Select and explain. 
A. Duchenne muscular atroply, B. Wilson disease, C. Beckers's dystrophy, D. Dermatomyositis
D: Dermatomyositis
Answer: D: Dermatomyositis 
Explanation: Muscle biopsy in dermatomyositis shows myonecrosis, myophagocytosis and perifascicular atrophy.