Pediatrics All are mitochondrial disorders except: A Pearson Syndrome B MERRF (Myoclonic Epilepsy Ragged Red Fibre) C MELAS (Mitochondrial Encephalopathy Lactic Acidosis and Stroke-like episode) D Fragile X Syndrome 💡 Explanation All are mitochondrial disorders except: ✓ Correct Answer: D. Fragile X Syndrome