<prompt> A 14-year-old boy presents with bilateral foot deformity. On examination thickened peripheral nerves and sensory gait ataxia is observed. On biopsy of the nerve, a typical onion bulb appearance is noted. The probable diagnosis is?Friedreich ataxiaAtaxia telangiectasiaCharcot Marie Tooth diseaseLeprosy  <response>: Image shows presence of Pes Cavus which indicates distal muscle weakness. Concomitant sensory deficit leads to Gait ataxia. Nerve biopsy: Classical onion bulb appearance so Charcot Marie Tooth disease. Charcot Marie Tooth disease Hereditary sensorimotor neuropathy manifests as: Peroneal muscle dystrophy Stork leg appearance Thickened nerves N. biopsy: Onion bulb appearance Distal weakness Flexion contractures 