This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Orthopaedics
[{'content': 'Not seen in osteogenesis imperfecta: \nSelect and explain. \nA. Wormian bones, B. Thick coex, C. Coxa vara, D. Saber shin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Osteogenesis imperfecta is a type- 1 collagen defect which affects the tensile strength of the bone.it most commonly occurs in femur. It leads to weakening of bones. Thin coex is the hallmark for osteogenesis imperfecta. Deformities occurring in osteogenesis imperfecta includes saber shin (bowing), Coxa vara (decreased neck- shaft angle of femur) and Wormian bones (sho, dot-like). Wormian bones are also found in down syndrome, osteogenesis imperfecta, trisomy and skeletal dysplasia', 'role': 'assistant'}]