<prompt> A 7 year old boy presented with double medial malleolus. X-Ray was performed . What is the treatment?Vitamin BVitamin CVitamin DVitamin E  <response>: Ans. c Vitamin DRef.: Maheshwari 5th ed. 311Scurvy causes failure of collagen synthesis and osteoid formation. It clinically presents with: Irritability Gum bleeding Pseudoparalysis due to subperiosteal haemorrhage Anemia and beading of costo-chondral junction. Radiological features are: Frenkels line dense line between metaphysic physisepiphysis, ring sign, thin cortex, scurvy line band of rarefaction on the diaphyseal side and metaphyseal osteopenia, cleft and fractures.Pathology: deficiency causes failure of collagen synthesis or primitive collagen formation, throughout the body, including in blood vessels, predisposing to haemorrhage.RICKETSSCURVY Metaphysis: indistinct; frayed, splaying, and cupping of margin. Patchy sclerosis in case of intermittent dietary deficiency Widened epiphysis with hazed cortical margin Generalized reduction in bone density Loosers zone less common Severe cases show Genu valgum, bow legs, thoracic kyphosis, pigeon chest, ricketic rosary, skull bossing, cox vera. Metaphysis: Frankels white line, Trummerfeld, lucent zone, Pelkan spur due to fracture. Wimbergers sign small epiphysis surrounded by sclerotic rim Subperiosteal hemorrhage with periosteal elevation Ground glass appearance of bone with pencil thin cortex. 