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: Medicine
The term 'ragged red fibers' is applied to describe the skeletal muscle fibers in - 
Select and explain. 
A. Myotonic dystrophy, B. Nemaline myopathy, C. Spinal muscular atrophy, D. Mitochondrial myopathy
D: Mitochondrial myopathy
Answer: D: Mitochondrial myopathy 
Explanation: Answer- D. Mitochondrial myopathyThe term 'ragged redfibers' is typically applied to describe the skeletal muscle fibers in mitochondrial myopathy.