This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Musculo Skeletal Disorders, Subject name: Pediatrics
Windswept deformity is seen in: 
Select and explain. 
A. Scurvy, B. Rickets, C. Achondroplasia, D. Osteoporosis
B: Rickets
Answer: B: Rickets 
Explanation: b. Rickets(Ref: Nelson's 20/e p 336, Ghai 8/e p 115)Windswept deformityDefinitionA valgus deformity of one in association with varus deformity of other kneeCauses* Rickets* Rheumatoid Arthritis* Physeal osteochondromatosis* Hereditary dysplasia (epiphyseal dysplasia) of bone