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'}]