This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': "Condition associated with lack of a single pelvic ala is : \nSelect and explain. \nA. Robe's pelvis, B. Naegele's pelvis, C. Rachitic pelvis, D. Osteomalacic pelvis", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is b i.e. Naegele's pelvis Pelvis Naegele's pelvis Robe's pelvis Rachitic pelvis Osteomalacic pelvis Kyphotic pelvis Characteristics feature Single Ala present Both Ala absent Seen in Ricketis pelvis. Reniform pelvis Seen in osteomalacia - triradiate pelvis Seen in kyphosis - funnel shaped pelvis", 'role': 'assistant'}]